find the fourth proportional of:
1. 2.1,1.5 and 8.4
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3
Answer:
6
Step-by-step explanation:
2.1 : 1.5 : : 8.4 : x
x = (1.5 × 8.4) ÷ 2.1 = 12.6 ÷ 2.1 = 6
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