Home / 3,131.35-4,311.38-2,382.91

Finding the Fourth Proportional to 3,131.35, 4,311.38 and 2,382.91

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Solution

The fourth proportional to 3,131.35, 4,311.38 and 2,382.91 is: 3,280.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.35 : 4,311.38 = 2,382.91 : x
  2. Step 2: Convert to fraction form
    3,131.35/4,311.38 = 2,382.91/x
  3. Step 3: Cross multiply
    3,131.35x = 4,311.38 × 2,382.91
  4. Step 4: Simplify right side
    3,131.35x = 10,273,625.69
  5. Step 5: Solve for x
    x = 10,273,625.69/3,131.35
  6. Step 6: Final answer
    x = 3,280.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.