Question

30:221::12:? What answer​

Answer 1

SOLUTION:

We have,

30:221::12:

Let the number be R.

=) 30 :221::12:R

=) 30 × R = 221×12

$= > R = \frac{221 \times 12}{30} \\ \\ = > R = 7.36 \times 12 \\ \\ = > R = 88.4$

Thank you.

Answer 2

The value of ? is 88.4

Step-by-step explanation:

The given proportion is

30:221::12:?

Write it in ratio form

$\frac{30}{221}=\frac{12}{?}$

Cross multiplying, we get

$30?=221\times12$

Divide both sides by 30

$?=\frac{221\times12}{30}\\\\?=\frac{442}{5}\\\\?=88.4$

#Learn More:

It is of ratio and proportion

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