Answer
To solve a proportion, use cross product principle
Work Step by Step
To solve a proportion, use cross product principle which is stated below,
Let $\frac{a}{b}::\frac{c}{d}$ are in proportion then,
$a\times d=b\times c$. That is product of means = product of extremes.
Example: If $2:x::\ 5:8$ then find the value of x
$2:x::\ 5:8$
Product of means $=$ product of extremes
\[2\times 8=x\times 5\]
This implies that,
\[\begin{align}
& x=\frac{2\times 8}{5} \\
& =\frac{16}{5}
\end{align}\]
