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Finding the Third Proportional to 7,279 and 10,915

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Solution

The third proportional to 7,279 and 10,915 is: 16,367.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,279 : 10,915 = 10,915 : x
  2. Step 2: Convert to fraction form
    7,279/10,915 = 10,915/x
  3. Step 3: Cross multiply
    7,279x = 10,915 × 10,915
  4. Step 4: Simplify right side
    7,279x = 119,137,225
  5. Step 5: Solve for x
    x = 119,137,225/7,279
  6. Step 6: Final answer
    x = 16,367.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.