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Finding the Third Proportional to 10,890 and 14,691

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Solution

The third proportional to 10,890 and 14,691 is: 19,818.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,890 : 14,691 = 14,691 : x
  2. Step 2: Convert to fraction form
    10,890/14,691 = 14,691/x
  3. Step 3: Cross multiply
    10,890x = 14,691 × 14,691
  4. Step 4: Simplify right side
    10,890x = 215,825,481
  5. Step 5: Solve for x
    x = 215,825,481/10,890
  6. Step 6: Final answer
    x = 19,818.69

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.