Finding the Fourth Proportional to 21,127,687.38, 31,854,467.61 and 20,996,532.99
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Solution
The fourth proportional to 21,127,687.38, 31,854,467.61 and 20,996,532.99 is: 31,656,724.56
Step by Step Solution
- Step 1: Write the proportion equation
21,127,687.38 : 31,854,467.61 = 20,996,532.99 : x - Step 2: Convert to fraction form
21,127,687.38/31,854,467.61 = 20,996,532.99/x - Step 3: Cross multiply
21,127,687.38x = 31,854,467.61 × 20,996,532.99 - Step 4: Simplify right side
21,127,687.38x = 668,833,380,052,251.38 - Step 5: Solve for x
x = 668,833,380,052,251.38/21,127,687.38 - Step 6: Final answer
x = 31,656,724.56
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Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.