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Finding the Third Proportional to 17,928 and 38,880

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Solution

The third proportional to 17,928 and 38,880 is: 84,318.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,928 : 38,880 = 38,880 : x
  2. Step 2: Convert to fraction form
    17,928/38,880 = 38,880/x
  3. Step 3: Cross multiply
    17,928x = 38,880 × 38,880
  4. Step 4: Simplify right side
    17,928x = 1,511,654,400
  5. Step 5: Solve for x
    x = 1,511,654,400/17,928
  6. Step 6: Final answer
    x = 84,318.07

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.