Question

Find the fourth proportional of 3,4 and 18 * please help

Answer 1

Answer:

12

Step-by-step explanation:

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Answer 2

Answer:

Required fourth proportional of 3,4,18 is 24.

Step-by-step explanation:

Here we want to find fourth proportional.

By a simple way we can solve this problem.

Let a,b,c are 3 number and we want to find fourth proportional of a,b,c.

Let fourth proportional of a,b,c be d.

Now relation between a,b,c,d is

$\frac{a}{b} = \frac{c}{d} \\ d = \frac{b \times c}{a}$

Here given numbers are 3,4,18.

Let fourth proportional of 3,4,18 be x.

So,$\frac{3}{4} = \frac{18}{x}$

By cross multiplication,

$3 \times x = 18 \times 4$

$x = \frac{18 \times 4}{3} = 24$

Required fourth proportional is 24.