Question

Select the related number from the given alternatives.
4 : 12 : 7 : ?

Answer 1

Answer:

4 : 12 :: 7 : x

$4 \times x = 12 \times 7 \\ x = \frac{12 \times 7}{4} \\ x = 3 \times 7 \\ x = 21$

Hope it helps ...