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Finding the Third Proportional to 8,634 and 9,912

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Solution

The third proportional to 8,634 and 9,912 is: 11,379.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,634 : 9,912 = 9,912 : x
  2. Step 2: Convert to fraction form
    8,634/9,912 = 9,912/x
  3. Step 3: Cross multiply
    8,634x = 9,912 × 9,912
  4. Step 4: Simplify right side
    8,634x = 98,247,744
  5. Step 5: Solve for x
    x = 98,247,744/8,634
  6. Step 6: Final answer
    x = 11,379.17

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Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.