Home / 7,811.92-11,722.20-3,198.16

Finding the Fourth Proportional to 7,811.92, 11,722.20 and 3,198.16

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Solution

The fourth proportional to 7,811.92, 11,722.20 and 3,198.16 is: 4,799.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,811.92 : 11,722.20 = 3,198.16 : x
  2. Step 2: Convert to fraction form
    7,811.92/11,722.20 = 3,198.16/x
  3. Step 3: Cross multiply
    7,811.92x = 11,722.20 × 3,198.16
  4. Step 4: Simplify right side
    7,811.92x = 37,489,471.15
  5. Step 5: Solve for x
    x = 37,489,471.15/7,811.92
  6. Step 6: Final answer
    x = 4,799.01

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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.