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Finding the Third Proportional to 13,672 and 20,906

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Solution

The third proportional to 13,672 and 20,906 is: 31,967.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,672 : 20,906 = 20,906 : x
  2. Step 2: Convert to fraction form
    13,672/20,906 = 20,906/x
  3. Step 3: Cross multiply
    13,672x = 20,906 × 20,906
  4. Step 4: Simplify right side
    13,672x = 437,060,836
  5. Step 5: Solve for x
    x = 437,060,836/13,672
  6. Step 6: Final answer
    x = 31,967.59

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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.