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Finding the Third Proportional to 13,128 and 20,349

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Solution

The third proportional to 13,128 and 20,349 is: 31,541.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128 : 20,349 = 20,349 : x
  2. Step 2: Convert to fraction form
    13,128/20,349 = 20,349/x
  3. Step 3: Cross multiply
    13,128x = 20,349 × 20,349
  4. Step 4: Simplify right side
    13,128x = 414,081,801
  5. Step 5: Solve for x
    x = 414,081,801/13,128
  6. Step 6: Final answer
    x = 31,541.88

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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.