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Finding the Third Proportional to 12,138 and 18,744

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Solution

The third proportional to 12,138 and 18,744 is: 28,945.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138 : 18,744 = 18,744 : x
  2. Step 2: Convert to fraction form
    12,138/18,744 = 18,744/x
  3. Step 3: Cross multiply
    12,138x = 18,744 × 18,744
  4. Step 4: Simplify right side
    12,138x = 351,337,536
  5. Step 5: Solve for x
    x = 351,337,536/12,138
  6. Step 6: Final answer
    x = 28,945.26

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.