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Finding the Third Proportional to 7,879 and 11,040

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Solution

The third proportional to 7,879 and 11,040 is: 15,469.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,879 : 11,040 = 11,040 : x
  2. Step 2: Convert to fraction form
    7,879/11,040 = 11,040/x
  3. Step 3: Cross multiply
    7,879x = 11,040 × 11,040
  4. Step 4: Simplify right side
    7,879x = 121,881,600
  5. Step 5: Solve for x
    x = 121,881,600/7,879
  6. Step 6: Final answer
    x = 15,469.17

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.