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Finding the Third Proportional to 11,707 and 15,291

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Solution

The third proportional to 11,707 and 15,291 is: 19,972.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,707 : 15,291 = 15,291 : x
  2. Step 2: Convert to fraction form
    11,707/15,291 = 15,291/x
  3. Step 3: Cross multiply
    11,707x = 15,291 × 15,291
  4. Step 4: Simplify right side
    11,707x = 233,814,681
  5. Step 5: Solve for x
    x = 233,814,681/11,707
  6. Step 6: Final answer
    x = 19,972.21

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.