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Finding the Third Proportional to 15,174 and 20,121

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Solution

The third proportional to 15,174 and 20,121 is: 26,680.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,174 : 20,121 = 20,121 : x
  2. Step 2: Convert to fraction form
    15,174/20,121 = 20,121/x
  3. Step 3: Cross multiply
    15,174x = 20,121 × 20,121
  4. Step 4: Simplify right side
    15,174x = 404,854,641
  5. Step 5: Solve for x
    x = 404,854,641/15,174
  6. Step 6: Final answer
    x = 26,680.81

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.