Home / 3,187.62-4,399.92-2,939.76

Finding the Fourth Proportional to 3,187.62, 4,399.92 and 2,939.76

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Solution

The fourth proportional to 3,187.62, 4,399.92 and 2,939.76 is: 4,057.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,187.62 : 4,399.92 = 2,939.76 : x
  2. Step 2: Convert to fraction form
    3,187.62/4,399.92 = 2,939.76/x
  3. Step 3: Cross multiply
    3,187.62x = 4,399.92 × 2,939.76
  4. Step 4: Simplify right side
    3,187.62x = 12,934,708.82
  5. Step 5: Solve for x
    x = 12,934,708.82/3,187.62
  6. Step 6: Final answer
    x = 4,057.80

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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.