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Finding the Third Proportional to 13,668 and 20,902

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Solution

The third proportional to 13,668 and 20,902 is: 31,964.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,668 : 20,902 = 20,902 : x
  2. Step 2: Convert to fraction form
    13,668/20,902 = 20,902/x
  3. Step 3: Cross multiply
    13,668x = 20,902 × 20,902
  4. Step 4: Simplify right side
    13,668x = 436,893,604
  5. Step 5: Solve for x
    x = 436,893,604/13,668
  6. Step 6: Final answer
    x = 31,964.71

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.