Question
Find the fourth proportion of (k - 2), (2k - 4) and (3k
- 6). (Note: 'k' is the smallest two-digit multiple of 3.)Solution
'k' = 12 k - 2 = 12 - 2 = 10 2k - 4 = 2 × 12 - 4 = 20 3k - 6 = 3 × 12 - 6 = 30 Let the fourth proportion be 'm'. 10 : 20 :: 30 : m So, 10 × m = 20 × 30 Or, 'm' = 60
More Ratio and proportion Questions
Evaluate
50 ÷ 5 of 4 of [9 ÷ 3 of (8 ÷ 4 + 4)] + (6 ÷ 3 + 3)
187 ÷ 5 ÷ 0.4 = ? – 24 × 2.4
42 + 52% of 300 - ?% of 200 = 88
What will come in the place of question mark (?) in the given expression?Â
? X (62 - 20) + 60 X 5 = √1296 X 25 - 35 X 43...
√10000 x √8100 - (50)² = √(?) + (80)²
(0.125)³÷ (0.25)² x (0.5)² = (0.5)?-3
63 × 4 = ?2 – 1620 ÷ 5
74% of 2840 + 80% of 1640 - ?= 47²
