Home / 7,917.20-11,879.91-5,743.87

Finding the Fourth Proportional to 7,917.20, 11,879.91 and 5,743.87

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Solution

The fourth proportional to 7,917.20, 11,879.91 and 5,743.87 is: 8,618.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,917.20 : 11,879.91 = 5,743.87 : x
  2. Step 2: Convert to fraction form
    7,917.20/11,879.91 = 5,743.87/x
  3. Step 3: Cross multiply
    7,917.20x = 11,879.91 × 5,743.87
  4. Step 4: Simplify right side
    7,917.20x = 68,236,651.96
  5. Step 5: Solve for x
    x = 68,236,651.96/7,917.20
  6. Step 6: Final answer
    x = 8,618.78

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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.