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Finding the Third Proportional to 12,449 and 18,421

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Solution

The third proportional to 12,449 and 18,421 is: 27,257.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,449 : 18,421 = 18,421 : x
  2. Step 2: Convert to fraction form
    12,449/18,421 = 18,421/x
  3. Step 3: Cross multiply
    12,449x = 18,421 × 18,421
  4. Step 4: Simplify right side
    12,449x = 339,333,241
  5. Step 5: Solve for x
    x = 339,333,241/12,449
  6. Step 6: Final answer
    x = 27,257.87

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.