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Finding the Third Proportional to 9,117 and 11,971

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Solution

The third proportional to 9,117 and 11,971 is: 15,718.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,117 : 11,971 = 11,971 : x
  2. Step 2: Convert to fraction form
    9,117/11,971 = 11,971/x
  3. Step 3: Cross multiply
    9,117x = 11,971 × 11,971
  4. Step 4: Simplify right side
    9,117x = 143,304,841
  5. Step 5: Solve for x
    x = 143,304,841/9,117
  6. Step 6: Final answer
    x = 15,718.42

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.