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Finding the Third Proportional to 9,917 and 13,161

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Solution

The third proportional to 9,917 and 13,161 is: 17,466.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,917 : 13,161 = 13,161 : x
  2. Step 2: Convert to fraction form
    9,917/13,161 = 13,161/x
  3. Step 3: Cross multiply
    9,917x = 13,161 × 13,161
  4. Step 4: Simplify right side
    9,917x = 173,211,921
  5. Step 5: Solve for x
    x = 173,211,921/9,917
  6. Step 6: Final answer
    x = 17,466.16

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.