Answer :
24 : 20 = 6 : 5
24 is 6 * 4
20 is 5 * 4
6 is 6 * 1
and 5 is 5 * 1
so x = 5
24 is 6 * 4
20 is 5 * 4
6 is 6 * 1
and 5 is 5 * 1
so x = 5
[tex]24:20=6:x\\\\\frac{24}{20}=\frac{6}{x}\ \ \ \ \ |cross\ multiply\\\\24x=20\times6\\\\24x=120\ \ \ \ \ |divide\ both\ sides\ by\ 24\\\\\boxed{x=5}[/tex]