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Finding the Third Proportional to 7,124 and 11,126

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Solution

The third proportional to 7,124 and 11,126 is: 17,376.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,124 : 11,126 = 11,126 : x
  2. Step 2: Convert to fraction form
    7,124/11,126 = 11,126/x
  3. Step 3: Cross multiply
    7,124x = 11,126 × 11,126
  4. Step 4: Simplify right side
    7,124x = 123,787,876
  5. Step 5: Solve for x
    x = 123,787,876/7,124
  6. Step 6: Final answer
    x = 17,376.18

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.