Question

find the fourth proportion of 15,12,35​

Answer 1

Answer:

28

Step-by-step explanation:

15/12=5/4

Similarly, 35/ ?=5/4

So,

7×5=35

and 7×4=28

So the fourth proportion will be 28

Answer 2

$\Huge\mathtt{\fcolorbox{pink}{purple}{✎Answer:- \: }}$

Let the fourth proportion be x. Then,

⇒ ad = bc

⇒ 15 × x = 12 × 35

✎By Transportation method:-

$⇒ x = \: \frac{12 \times 35}{15} \\ ⇒x = 4 \times 7 \\ ⇒x \: = 28$

∴ So, the fourth proportion of 15:12::35:28 ✔

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