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Finding the Third Proportional to 12,078 and 21,234

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Solution

The third proportional to 12,078 and 21,234 is: 37,330.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,078 : 21,234 = 21,234 : x
  2. Step 2: Convert to fraction form
    12,078/21,234 = 21,234/x
  3. Step 3: Cross multiply
    12,078x = 21,234 × 21,234
  4. Step 4: Simplify right side
    12,078x = 450,882,756
  5. Step 5: Solve for x
    x = 450,882,756/12,078
  6. Step 6: Final answer
    x = 37,330.91

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Why These Related Problems?

These problems maintain the same ratio (1.76) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.