Home / 5,422.12-8,129.24-3,662.78

Finding the Fourth Proportional to 5,422.12, 8,129.24 and 3,662.78

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Solution

The fourth proportional to 5,422.12, 8,129.24 and 3,662.78 is: 5,491.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,422.12 : 8,129.24 = 3,662.78 : x
  2. Step 2: Convert to fraction form
    5,422.12/8,129.24 = 3,662.78/x
  3. Step 3: Cross multiply
    5,422.12x = 8,129.24 × 3,662.78
  4. Step 4: Simplify right side
    5,422.12x = 29,775,617.69
  5. Step 5: Solve for x
    x = 29,775,617.69/5,422.12
  6. Step 6: Final answer
    x = 5,491.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.