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Finding the Third Proportional to 16,918 and 18,754

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Solution

The third proportional to 16,918 and 18,754 is: 20,789.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,918 : 18,754 = 18,754 : x
  2. Step 2: Convert to fraction form
    16,918/18,754 = 18,754/x
  3. Step 3: Cross multiply
    16,918x = 18,754 × 18,754
  4. Step 4: Simplify right side
    16,918x = 351,712,516
  5. Step 5: Solve for x
    x = 351,712,516/16,918
  6. Step 6: Final answer
    x = 20,789.25

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Why These Related Problems?

These problems maintain the same ratio (1.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.