Question

Find the value of x
5:x=1:25:2.5

Answer 1

$5 : x = 1 : 25: 2.5 \\ \\ \frac{5}{x} = \frac{ \frac{1}{25} }{2.5} \\ \\ 12.5 = \frac{x}{25} \\ 312.5 = x$

Or,

$5: x = 1: 25: 2.5 \\ \\ \frac{5}{x} = \frac{1}{ \frac{25}{2.5} } \\ \\ \frac{125}{2.5} = x \\ \\ \frac{1250}{25} = x \\ \\ x = 50$