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Finding the Third Proportional to 7,912 and 9,124

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Solution

The third proportional to 7,912 and 9,124 is: 10,521.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,912 : 9,124 = 9,124 : x
  2. Step 2: Convert to fraction form
    7,912/9,124 = 9,124/x
  3. Step 3: Cross multiply
    7,912x = 9,124 × 9,124
  4. Step 4: Simplify right side
    7,912x = 83,247,376
  5. Step 5: Solve for x
    x = 83,247,376/7,912
  6. Step 6: Final answer
    x = 10,521.66

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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.