I'm pretty sure it is scaled to 0.92, which would explain what you're seeing in Acrobat. (Unfortunately, I can't verify since acroread
doesn't seem to have this option, which also means I can't be 100% sure that you are now getting something Adobe will call 10pt.)
If you are using the non-expert set of Adobe Utopia Regular with Fourier, you can set the scale factor manually. Here's a rather low-level example.
\documentclass[10pt]{article}
\usepackage{fourier}
\usepackage[T1]{fontenc}
% from T1futs.fd
\DeclareFontFamily{T1}{futs}{\providecommand {\SetFourierSpace }{}}
% Note:
% m = medium
% n = normal
% b = bold
% it = italic
% sc = small caps
% sl = slant
\DeclareFontShape{T1}{futs}{m}{n}{
<-> s * [.75] futr8t % <-- note the explicit scale to '0.75'
}{\SetFourierSpace}
\DeclareFontShape{T1}{futs}{m}{it}{
<-> s * [1.5] futri8t % <-- regular italics scaled to '1.5'
}{\SetFourierSpace}
\DeclareFontShape{T1}{futs}{b}{n}{
<-> futb8t
}{\SetFourierSpace}
\DeclareFontShape{T1}{futs}{b}{it}{
<-> futbi8t
}{\SetFourierSpace}
\DeclareFontShape{T1}{futs}{m}{sc}{
<-> futrc8t
}{\SetFourierSpace}
\DeclareFontShape{T1}{futs}{b}{sc}{
<-> futbc8t
}{\SetFourierSpace}
\DeclareFontShape{T1}{futs}{m}{sl}{
<-> futro8t
}{\SetFourierSpace}
\DeclareFontShape{T1}{futs}{b}{sl}{
<-> futbo8t
}{\SetFourierSpace}
\DeclareFontShape{T1}{futs}{bx}{n}{<->ssub * futs/b/n}{}
\DeclareFontShape{T1}{futs}{bx}{it}{<->ssub * futs/b/it}{}
\DeclareFontShape{T1}{futs}{bx}{sc}{<->ssub * futs/b/sc}{}
\DeclareFontShape{T1}{futs}{bx}{sl}{<->ssub * futs/b/sl}{}
\parskip 10pt
\parindent 0pt
\begin{document}
3/4 scale for regular text. 1234567890
\emph{1.5x scale for italics. 1234567890}
\textsc{\ldots and everything else is ``scaled''}
\textbf{to ``1.0''}
\end{document}
I'm sure there must be a better way, but I tend to use fontspec
nowadays, so I tend to recommend its use over fiddling with the complicated world of fonts....
Addendum: If you find the lines look too cramped due to the 'unscaling', you could add to your preamble:
\usepackage{setspace}
\setstretch{1.09}% 1/.92 = 1.086956522
... and as an example, try this:
\usepackage{multicol}
...
% after \begin{document}
\begin{multicols*}{2}
\begin{spacing}{1.0}% change to 1.09 to see the difference
\lipsum[1]
\columnbreak
\fontfamily{cmr}\selectfont % Computer Modern as a point of comparison
\lipsum[1]
\end{multicols*}