Home / 3,721.70-5,131.41-3,278.90

Finding the Fourth Proportional to 3,721.70, 5,131.41 and 3,278.90

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Solution

The fourth proportional to 3,721.70, 5,131.41 and 3,278.90 is: 4,520.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,721.70 : 5,131.41 = 3,278.90 : x
  2. Step 2: Convert to fraction form
    3,721.70/5,131.41 = 3,278.90/x
  3. Step 3: Cross multiply
    3,721.70x = 5,131.41 × 3,278.90
  4. Step 4: Simplify right side
    3,721.70x = 16,825,380.25
  5. Step 5: Solve for x
    x = 16,825,380.25/3,721.70
  6. Step 6: Final answer
    x = 4,520.89

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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.