Question

Find the value of $x$, if the following is in proportion: $8,x,9and36$.

Answer 1

Find the value of $x$:

Since $8,x,9and36$ are in proportion,

$8:x::9:36$

$\Rightarrow \frac{8}{x}=\frac{9}{36}$

$\Rightarrow 9\times x=8\times 36$

$\Rightarrow x=\frac{8\times 36}{9}$

$\Rightarrow x=32$

Hence, the value of $x$ is 32.