Question

I want answer in logical reasoning 15:81::3:?​

Answer 1

Answer:

1  

16.2 ( simple proportion)

Step-by-step explanation:

I want answer in logical reasoning 15:81::3:?​

15:81::3: 1

15 = 3 * 5

81 = 3⁵⁻¹ = 3⁴

3 = 3 * 1

3¹⁻¹ = 3⁰ = 1

Formula used

second number in ratio  =   3 Raise to power ( (1st number divided by 3)  -  1)

if we use simple proportion then

a : b  ::  c : d

=> a/b  = c/d

let say  x replaces question mark

15:81::3:x

=> 15/81  = 3/x

=> x =  3 * 81 / 15

=>x = 81/5

=> x = 16.2