Finding the Fourth Proportional to 21,120,776.92, 29,159,836.14 and 14,516,736.76
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Solution
The fourth proportional to 21,120,776.92, 29,159,836.14 and 14,516,736.76 is: 20,042,144.61
Step by Step Solution
- Step 1: Write the proportion equation
21,120,776.92 : 29,159,836.14 = 14,516,736.76 : x - Step 2: Convert to fraction form
21,120,776.92/29,159,836.14 = 14,516,736.76/x - Step 3: Cross multiply
21,120,776.92x = 29,159,836.14 × 14,516,736.76 - Step 4: Simplify right side
21,120,776.92x = 423,305,665,209,114.50 - Step 5: Solve for x
x = 423,305,665,209,114.50/21,120,776.92 - Step 6: Final answer
x = 20,042,144.61
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.