Question

find the fourth proportional to 21, 10 and 84 do in step​

Answer 1

Answer:40

Step-by-step explanation:

Let fourth proportion be x

21:10::84:x

21x=10*84

x=840/21

x=40

Answer 2

Answer:

40

Step-by-step explanation:

21:10:84:x

21x=10×84

x=840/21

x= 40