Home / 7,515.20-11,272.72-2,321.12

Finding the Fourth Proportional to 7,515.20, 11,272.72 and 2,321.12

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Solution

The fourth proportional to 7,515.20, 11,272.72 and 2,321.12 is: 3,481.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,515.20 : 11,272.72 = 2,321.12 : x
  2. Step 2: Convert to fraction form
    7,515.20/11,272.72 = 2,321.12/x
  3. Step 3: Cross multiply
    7,515.20x = 11,272.72 × 2,321.12
  4. Step 4: Simplify right side
    7,515.20x = 26,165,335.85
  5. Step 5: Solve for x
    x = 26,165,335.85/7,515.20
  6. Step 6: Final answer
    x = 3,481.66

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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.