Question

find the missing term in the following proportions.
(i) x: 3::9:27​

Answer 1

Answer:

x: 3::9:27

=> (x/3)=(9/27)

=> 27x=9*3. (cross multiplication)

=> x=(9*3)/27

So, x=1

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Answer 2

Answer:

Given proportion of 2 ratios = x : 3 : : 9 : 27

We know that product of means is equal to product of extremes.

(a : b : : c : d is equal to bc = ad)

So, by substituting the values, we will get the value of x in the following proportion.

⇒ x : 3 : : 9 : 27

⇒ 9 * 3 = x * 27

⇒ 27 = 27x

⇒ $\frac{27}{27}$ = x

⇒ 1 = x

∴So, the value of x in the given proportion is 1

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