Question Details

Find the fourth proportional to 2, 6, 8.

Options

A

24

B

12

C

36

D

48

Show Answer

Correct Answer :

Option A

24

Solution :

The correct option is 24.

To find the fourth proportional to three numbers a, b, and c, we let the fourth proportional be x.

By definition of proportionality, the ratio of the first two numbers is equal to the ratio of the last two numbers:

ab=cx

Given the numbers:

a=2

b=6

c=8

Substituting these values into the proportion equation gives:

26=8x

Cross-multiplying to solve for x:

2×x=6×8

2x=48

Dividing both sides by 2:

x=482

x=24

Hence, the fourth proportional to 2, 6, and 8 is 24.

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