Question

Find the fourth proportional to 7, 13 and 35​

Answer 1

Answer:

1

What is the fourth proportion of 1, 3 and 7?

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Charles Holmes

Answered February 1, 2020

The fourth proportional is 21. 1:3::7:x=1:3::7:21

PREMISES

y=the fourth proportional of the ratios 1:3::7:x

CALCULATIONS

y=the fourth proportional of the ratios 1:3::7:x

1:3::7:x

1/3::7/21

and,

1:3::7:21

Answer 2

Answer:

65

Step-by-step explanation:

7:13::35:x (let)

I.e 7/13=35/x

x=35×13/7

x=5×13 ( as 35 will get cancelled by 7 to 5)

x=65

Hope it will be helpful to you