Find the fourth proportional of 15, 25 and 12.
20
The fourth proportional is found using the formula: If a, b, c, and d are in proportion, then (a × d) = (b × c). Substituting the given values: (15 × d) = (25 × 12) ⇒ d = (25 × 12) ÷ 15 ⇒ d = 20 Thus, the fourth proportional is 20.
Important Questions from Arithmetic Progression
If the arithmetic mean of a, b, c is \(\rm \frac M 3\) and \(\rm \frac{1}{a} + \frac{1}{b} = -\frac{1}{c} \) , then the arithmetic mean of a 2, b 2, c 2 is
How many two-digit numbers are divisible by 3 ?
A person saves Rs. 1000 more than he did the previous year. If he saves Rs. 2000 in the first year, in how many years will he save Rs. 170000?
A car starts with a speed of 60 km/h with its speed increasing every one hour by 5 km/h. In how many hours will it cover 435 kms?
How many natural numbers lie between 3 and 200 which are divisible by 7?
