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Finding the Third Proportional to 20,387.25 and 31,508.63

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Solution

The third proportional to 20,387.25 and 31,508.63 is: 48,696.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,387.25 : 31,508.63 = 31,508.63 : x
  2. Step 2: Convert to fraction form
    20,387.25/31,508.63 = 31,508.63/x
  3. Step 3: Cross multiply
    20,387.25x = 31,508.63 × 31,508.63
  4. Step 4: Simplify right side
    20,387.25x = 992,793,449.39
  5. Step 5: Solve for x
    x = 992,793,449.39/20,387.25
  6. Step 6: Final answer
    x = 48,696.78

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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.