Question

Calculate the fourth proportional to 9,12,18

Answer 1

Answer:

24

Step-by-step explanation:

let: 4th proportional be =B

9:12::18:B

or; 9/12=18/B

or; 9B=12*18

or;9B=216

or; B=216/9

hence, B=24

so, the 4th proportion is 24