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Finding the Third Proportional to 19,728 and 27,744

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Solution

The third proportional to 19,728 and 27,744 is: 39,017.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,728 : 27,744 = 27,744 : x
  2. Step 2: Convert to fraction form
    19,728/27,744 = 27,744/x
  3. Step 3: Cross multiply
    19,728x = 27,744 × 27,744
  4. Step 4: Simplify right side
    19,728x = 769,729,536
  5. Step 5: Solve for x
    x = 769,729,536/19,728
  6. Step 6: Final answer
    x = 39,017.11

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.