\documentclass[a4paper,15pt]{report}    

\usepackage[extrafootnotefeatures]{xepersian}
\setlatintextfont[Scale=1.5]{Times New Roman}
\settextfont[Scale=1.5]{XB Zar}
\setdigitfont{XB Zar}
\DefaultMathsDigits

\begin{document}

متن
\LTRfootnote{text}

\end{document}