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Finding the Third Proportional to 20,412 and 31,539.38

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Solution

The third proportional to 20,412 and 31,539.38 is: 48,732.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,412 : 31,539.38 = 31,539.38 : x
  2. Step 2: Convert to fraction form
    20,412/31,539.38 = 31,539.38/x
  3. Step 3: Cross multiply
    20,412x = 31,539.38 × 31,539.38
  4. Step 4: Simplify right side
    20,412x = 994,732,175.39
  5. Step 5: Solve for x
    x = 994,732,175.39/20,412
  6. Step 6: Final answer
    x = 48,732.71

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.