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Finding the Third Proportional to 12,945 and 16,857

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Solution

The third proportional to 12,945 and 16,857 is: 21,951.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,945 : 16,857 = 16,857 : x
  2. Step 2: Convert to fraction form
    12,945/16,857 = 16,857/x
  3. Step 3: Cross multiply
    12,945x = 16,857 × 16,857
  4. Step 4: Simplify right side
    12,945x = 284,158,449
  5. Step 5: Solve for x
    x = 284,158,449/12,945
  6. Step 6: Final answer
    x = 21,951.21

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Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.