Find the fourth proportional of 4, 12, and 20.

Correct option is B

Given:
First number = 4
Second number = 12
Third number = 20
Formula Used:
If a, b, c are three given numbers, then the fourth proportional (x)  = $$\frac{b × c} a$$​​
Solution:
Fourth proportional = $$\frac{12 \times 20} 4$$​​
=> Fourth proportional = $$\frac{240} 4$$​​
=> Fourth proportional = 60