Question

6. Find the value of x so that: 5, 15, x, x+8 are proportional​

Answer 1

Answer:

X=4 (hope you understand).

Step-by-step explanation:

5/15:: X/X+8

5(X+8) =15 (X)

5x+40=15x

40=15x- 5x

40=10x

therefore,X=4

Answer 2

The value of x is 4

Solution:

Given that,

5, 15, x, x+8 are proportional​

Which means,

5 : 15 : : x : x + 8

We know that,

a : b : : c : d

Then,

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

Therefore,

$\frac{5}{15} = \frac{x}{x + 8}\\\\5 \times x + 8 = 15x\\\\5x + 40 = 15x\\\\15x - 5x = 40\\\\10x = 40\\\\x =4$

Thus value of x is 4

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