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Finding the Third Proportional to 12,139 and 18,741

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Solution

The third proportional to 12,139 and 18,741 is: 28,933.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,139 : 18,741 = 18,741 : x
  2. Step 2: Convert to fraction form
    12,139/18,741 = 18,741/x
  3. Step 3: Cross multiply
    12,139x = 18,741 × 18,741
  4. Step 4: Simplify right side
    12,139x = 351,225,081
  5. Step 5: Solve for x
    x = 351,225,081/12,139
  6. Step 6: Final answer
    x = 28,933.61

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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.