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Find the fourth proportion of 4, 9 & 12 (a) 18 (b) 36 (c) 72 (d) 27 (e) 24 8. Find the third proportion of 16 and 36 ... RATIO AND PROPORTION WORKSHEETS . www.cuemath.com 12. Find the duplicate ratio of 4 : 5. ... inverse proportion. 2. Ratio of water and land on the earth is 29 : 71. 3. The ratio of carbon to oxygen in
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