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Finding the Third Proportional to 15,928 and 20,692

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Solution

The third proportional to 15,928 and 20,692 is: 26,880.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,928 : 20,692 = 20,692 : x
  2. Step 2: Convert to fraction form
    15,928/20,692 = 20,692/x
  3. Step 3: Cross multiply
    15,928x = 20,692 × 20,692
  4. Step 4: Simplify right side
    15,928x = 428,158,864
  5. Step 5: Solve for x
    x = 428,158,864/15,928
  6. Step 6: Final answer
    x = 26,880.89

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Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.