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Finding the Third Proportional to 20,331 and 42,879.38

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Solution

The third proportional to 20,331 and 42,879.38 is: 90,435.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,331 : 42,879.38 = 42,879.38 : x
  2. Step 2: Convert to fraction form
    20,331/42,879.38 = 42,879.38/x
  3. Step 3: Cross multiply
    20,331x = 42,879.38 × 42,879.38
  4. Step 4: Simplify right side
    20,331x = 1,838,640,800.39
  5. Step 5: Solve for x
    x = 1,838,640,800.39/20,331
  6. Step 6: Final answer
    x = 90,435.34

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.