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Finding the Third Proportional to 8,565 and 12,891

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Solution

The third proportional to 8,565 and 12,891 is: 19,401.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,565 : 12,891 = 12,891 : x
  2. Step 2: Convert to fraction form
    8,565/12,891 = 12,891/x
  3. Step 3: Cross multiply
    8,565x = 12,891 × 12,891
  4. Step 4: Simplify right side
    8,565x = 166,177,881
  5. Step 5: Solve for x
    x = 166,177,881/8,565
  6. Step 6: Final answer
    x = 19,401.97

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.