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Finding the Third Proportional to 18,721.13 and 40,513.92

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Solution

The third proportional to 18,721.13 and 40,513.92 is: 87,675.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721.13 : 40,513.92 = 40,513.92 : x
  2. Step 2: Convert to fraction form
    18,721.13/40,513.92 = 40,513.92/x
  3. Step 3: Cross multiply
    18,721.13x = 40,513.92 × 40,513.92
  4. Step 4: Simplify right side
    18,721.13x = 1,641,377,865.69
  5. Step 5: Solve for x
    x = 1,641,377,865.69/18,721.13
  6. Step 6: Final answer
    x = 87,675.17

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.