Home / 7,500.75-11,245.05-3,121.49

Finding the Fourth Proportional to 7,500.75, 11,245.05 and 3,121.49

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Solution

The fourth proportional to 7,500.75, 11,245.05 and 3,121.49 is: 4,679.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,500.75 : 11,245.05 = 3,121.49 : x
  2. Step 2: Convert to fraction form
    7,500.75/11,245.05 = 3,121.49/x
  3. Step 3: Cross multiply
    7,500.75x = 11,245.05 × 3,121.49
  4. Step 4: Simplify right side
    7,500.75x = 35,101,254.90
  5. Step 5: Solve for x
    x = 35,101,254.90/7,500.75
  6. Step 6: Final answer
    x = 4,679.70

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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.