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Finding the Third Proportional to 12,642 and 27,687

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Solution

The third proportional to 12,642 and 27,687 is: 60,636.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,642 : 27,687 = 27,687 : x
  2. Step 2: Convert to fraction form
    12,642/27,687 = 27,687/x
  3. Step 3: Cross multiply
    12,642x = 27,687 × 27,687
  4. Step 4: Simplify right side
    12,642x = 766,569,969
  5. Step 5: Solve for x
    x = 766,569,969/12,642
  6. Step 6: Final answer
    x = 60,636.76

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.