Home / 7,418.52-11,129.01-3,520.80

Finding the Fourth Proportional to 7,418.52, 11,129.01 and 3,520.80

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Solution

The fourth proportional to 7,418.52, 11,129.01 and 3,520.80 is: 5,281.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,418.52 : 11,129.01 = 3,520.80 : x
  2. Step 2: Convert to fraction form
    7,418.52/11,129.01 = 3,520.80/x
  3. Step 3: Cross multiply
    7,418.52x = 11,129.01 × 3,520.80
  4. Step 4: Simplify right side
    7,418.52x = 39,183,018.41
  5. Step 5: Solve for x
    x = 39,183,018.41/7,418.52
  6. Step 6: Final answer
    x = 5,281.78

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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.