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Finding the Third Proportional to 11,287 and 16,931

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Solution

The third proportional to 11,287 and 16,931 is: 25,397.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,287 : 16,931 = 16,931 : x
  2. Step 2: Convert to fraction form
    11,287/16,931 = 16,931/x
  3. Step 3: Cross multiply
    11,287x = 16,931 × 16,931
  4. Step 4: Simplify right side
    11,287x = 286,658,761
  5. Step 5: Solve for x
    x = 286,658,761/11,287
  6. Step 6: Final answer
    x = 25,397.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.