Question

Find the value of $x$, if the following is in proportion: $2,6,x$and $18$.

Answer 1

Find the value of $x$:

Since $2,6,x$and $18$. are in proportion,

$2:6::x:18$

$\Rightarrow \frac{2}{6}=\frac{x}{18}$

$\Rightarrow 6\times x=2\times 18$

$\Rightarrow x=\frac{2\times 18}{6}$

$\Rightarrow x=6$

Hence, the value of $x$ is 6.