Home / 3,125.57-4,311.38-2,131.31

Finding the Fourth Proportional to 3,125.57, 4,311.38 and 2,131.31

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Solution

The fourth proportional to 3,125.57, 4,311.38 and 2,131.31 is: 2,939.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,125.57 : 4,311.38 = 2,131.31 : x
  2. Step 2: Convert to fraction form
    3,125.57/4,311.38 = 2,131.31/x
  3. Step 3: Cross multiply
    3,125.57x = 4,311.38 × 2,131.31
  4. Step 4: Simplify right side
    3,125.57x = 9,188,876.65
  5. Step 5: Solve for x
    x = 9,188,876.65/3,125.57
  6. Step 6: Final answer
    x = 2,939.90

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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.