Home / 5,641.20-7,785.36-3,123.90

Finding the Fourth Proportional to 5,641.20, 7,785.36 and 3,123.90

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Solution

The fourth proportional to 5,641.20, 7,785.36 and 3,123.90 is: 4,311.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,641.20 : 7,785.36 = 3,123.90 : x
  2. Step 2: Convert to fraction form
    5,641.20/7,785.36 = 3,123.90/x
  3. Step 3: Cross multiply
    5,641.20x = 7,785.36 × 3,123.90
  4. Step 4: Simplify right side
    5,641.20x = 24,320,686.10
  5. Step 5: Solve for x
    x = 24,320,686.10/5,641.20
  6. Step 6: Final answer
    x = 4,311.26

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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.