\({T_1} = T\)
\({T_2} = \frac{T}{4}\),
\({V_1} = V\)
\(T{V^{\gamma - 1}} = \)constant \({\left( {\frac{{{V_2}}}{{{V_1}}}} \right)^{\gamma - 1}} = \frac{{{T_1}}}{{{T_2}}} = 4\)
==> \(\frac{{{V_2}}}{{{V_1}}} = {(4)^{\frac{1}{{\gamma - 1}}}}\)[[ = 3/2 ]==> \({V_2} = {V_1}{(4)^{\frac{1}{{3/2 - 1}}}}\)
\( = {V_1}{(4)^2}\)
\( = 16\,{V_1}\)
\(\frac{{{V_2}}}{{{V_1}}} = 16\)