Question

.6 Find the missing number in the following propert
2:5::():15​

Answer 1

Let supposing that required number is a.

Therefore,

2:5 :: x:15

According to the properties of proportion :

Product of extremes = product of means

In the given proportion, :

2 and 15 are extremes and 5 and a are means

Solving :-

According to the given properties, we can write proportion as :

2×15 = 5×a

=> 30 = 5a

=> a = $\small{\sf{ \frac{30}{5} }}$

=> a = 6

Hence we find the value of a =

$\large{\boxed{\sf{\pink{a=\: 6 }}}}$

✢ ______________________________ ✢

$\large{\bf{\underline{\underline{What~is~extremes~and~means:}}}}$

In a proportion; the first and the last terms are called the extremes; whereas the second and the third terms are called the means.