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Finding the Fourth Proportional to 7,279.12, 10,920.24 and 2,662

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Solution

The fourth proportional to 7,279.12, 10,920.24 and 2,662 is: 3,993.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,279.12 : 10,920.24 = 2,662 : x
  2. Step 2: Convert to fraction form
    7,279.12/10,920.24 = 2,662/x
  3. Step 3: Cross multiply
    7,279.12x = 10,920.24 × 2,662
  4. Step 4: Simplify right side
    7,279.12x = 29,069,678.88
  5. Step 5: Solve for x
    x = 29,069,678.88/7,279.12
  6. Step 6: Final answer
    x = 3,993.57

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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.