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Finding the Third Proportional to 13,387.50 and 20,121

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Solution

The third proportional to 13,387.50 and 20,121 is: 30,241.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,387.50 : 20,121 = 20,121 : x
  2. Step 2: Convert to fraction form
    13,387.50/20,121 = 20,121/x
  3. Step 3: Cross multiply
    13,387.50x = 20,121 × 20,121
  4. Step 4: Simplify right side
    13,387.50x = 404,854,641
  5. Step 5: Solve for x
    x = 404,854,641/13,387.50
  6. Step 6: Final answer
    x = 30,241.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.