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Finding the Third Proportional to 18,911 and 29,413

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Solution

The third proportional to 18,911 and 29,413 is: 45,747.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,911 : 29,413 = 29,413 : x
  2. Step 2: Convert to fraction form
    18,911/29,413 = 29,413/x
  3. Step 3: Cross multiply
    18,911x = 29,413 × 29,413
  4. Step 4: Simplify right side
    18,911x = 865,124,569
  5. Step 5: Solve for x
    x = 865,124,569/18,911
  6. Step 6: Final answer
    x = 45,747.16

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.