Question

Find the 4th proportional of 9.6 kg, 7.2 kg, 28.8 kg

Answer 1

Answer:

21.6

Step-by-step explanation:

9.6:7.2::28.8:x

(7.2×28.8)÷9.6=x

X=21.6

Answer 2

Step-by-step explanation:

let the fourth proportional be x

therefore, 9.6 : 7.6 : : 28.8 : x

> 9.6/7.6 = 28.8 : x

> 9.6x = 28.8 × 7.6

> x = 218.88/9.6

> x = 22.8

therefore the fourth proportional be 22.8 Ans.