Question

the first three terms of a proportion are 15,20,and30.find the fourth proportion.​

Answer 1

Answer:40

Step-by-step explanation:

Let 4th proportion be x

Therfore

15:20:30:x are in proportion

a:b=c:d

15:20=30:x

X=(30×20)÷15

x=600÷15

x=40

40 is the 4th proportion to 15,20,30

Answer 2

answer

40

Step-by-step explanation:

let fourth proportion be x

Therefore,

the proportion will be,

15:20::30:x

product of extreme = product of internal

15x=20×30

x=600/15 (divide both side by 15)

x=40

SO,the fourth proportion is 40