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Finding the Third Proportional to 3,988 and 9,916

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Solution

The third proportional to 3,988 and 9,916 is: 24,655.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988 : 9,916 = 9,916 : x
  2. Step 2: Convert to fraction form
    3,988/9,916 = 9,916/x
  3. Step 3: Cross multiply
    3,988x = 9,916 × 9,916
  4. Step 4: Simplify right side
    3,988x = 98,327,056
  5. Step 5: Solve for x
    x = 98,327,056/3,988
  6. Step 6: Final answer
    x = 24,655.73

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Why These Related Problems?

These problems maintain the same ratio (2.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.