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Finding the Third Proportional to 16,686 and 36,279

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Solution

The third proportional to 16,686 and 36,279 is: 78,878.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,686 : 36,279 = 36,279 : x
  2. Step 2: Convert to fraction form
    16,686/36,279 = 36,279/x
  3. Step 3: Cross multiply
    16,686x = 36,279 × 36,279
  4. Step 4: Simplify right side
    16,686x = 1,316,165,841
  5. Step 5: Solve for x
    x = 1,316,165,841/16,686
  6. Step 6: Final answer
    x = 78,878.45

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.