Advertisements
Advertisements
प्रश्न
Find the fourth proportion to the following:
3,5 and 15
Advertisements
उत्तर
Let x be the fourth proportion to 3,5 and 15
3 : 5 :: 15 : x
⇒ 3 × x = 5 × 15
⇒ x = `(5 xx 15)/3`
⇒ x = 25
The fourth proportion is 25.
APPEARS IN
संबंधित प्रश्न
Using properties of proportion, solve for x. Given that x is positive:
`(2x + sqrt(4x^2 -1))/(2x - sqrt(4x^2 - 1)) = 4`
Write (T) for true and (F) for false in case of the following:
30 bags : 18 bags : : Rs 450 : Rs 270
If the cost of 14 m of cloth is Rs 1890, find the cost of 6 m of cloth.
If 22.5 m of a uniform iron rod weighs 85.5 kg, what will be the weight of 5 m of the same rod?
The cost of 18 chairs is Rs 22770. How many such chairs can be bought for Rs 10120?
A labourer earns Rs 1980 in 12 days.
(i) How much does he earn in 7 days?
(ii) In how many days will he earn Rs 2640?
If 24 workers can build a wall in 15 days, how many days will 8 workers take to build a similar wall?
If a, b, c and d are in proportion, prove that: (ma + nb) : b = (mc + nd) : d
Choose the correct answer from the given options :
The third proportional to `6(1)/(4)` and 5 is
If a, b, c, d, e are in continued proportion, prove that: a : e = a4 : b4.
