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Finding the Third Proportional to 16,916 and 38,987

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Solution

The third proportional to 16,916 and 38,987 is: 89,854.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,916 : 38,987 = 38,987 : x
  2. Step 2: Convert to fraction form
    16,916/38,987 = 38,987/x
  3. Step 3: Cross multiply
    16,916x = 38,987 × 38,987
  4. Step 4: Simplify right side
    16,916x = 1,519,986,169
  5. Step 5: Solve for x
    x = 1,519,986,169/16,916
  6. Step 6: Final answer
    x = 89,854.94

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Why These Related Problems?

These problems maintain the same ratio (2.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.