Home / 7,811.75-11,722.17-3,132.20

Finding the Fourth Proportional to 7,811.75, 11,722.17 and 3,132.20

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Solution

The fourth proportional to 7,811.75, 11,722.17 and 3,132.20 is: 4,700.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,811.75 : 11,722.17 = 3,132.20 : x
  2. Step 2: Convert to fraction form
    7,811.75/11,722.17 = 3,132.20/x
  3. Step 3: Cross multiply
    7,811.75x = 11,722.17 × 3,132.20
  4. Step 4: Simplify right side
    7,811.75x = 36,716,180.87
  5. Step 5: Solve for x
    x = 36,716,180.87/7,811.75
  6. Step 6: Final answer
    x = 4,700.12

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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.