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Finding the Third Proportional to 11,887.31 and 18,397.13

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Solution

The third proportional to 11,887.31 and 18,397.13 is: 28,471.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,887.31 : 18,397.13 = 18,397.13 : x
  2. Step 2: Convert to fraction form
    11,887.31/18,397.13 = 18,397.13/x
  3. Step 3: Cross multiply
    11,887.31x = 18,397.13 × 18,397.13
  4. Step 4: Simplify right side
    11,887.31x = 338,454,208.27
  5. Step 5: Solve for x
    x = 338,454,208.27/11,887.31
  6. Step 6: Final answer
    x = 28,471.89

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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.