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Finding the Third Proportional to 6,918 and 11,781

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Solution

The third proportional to 6,918 and 11,781 is: 20,062.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,918 : 11,781 = 11,781 : x
  2. Step 2: Convert to fraction form
    6,918/11,781 = 11,781/x
  3. Step 3: Cross multiply
    6,918x = 11,781 × 11,781
  4. Step 4: Simplify right side
    6,918x = 138,791,961
  5. Step 5: Solve for x
    x = 138,791,961/6,918
  6. Step 6: Final answer
    x = 20,062.44

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Why These Related Problems?

These problems maintain the same ratio (1.70) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.