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Finding the Fourth Proportional to 7,500.70, 11,242.05 and 3,115.90

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Solution

The fourth proportional to 7,500.70, 11,242.05 and 3,115.90 is: 4,670.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,500.70 : 11,242.05 = 3,115.90 : x
  2. Step 2: Convert to fraction form
    7,500.70/11,242.05 = 3,115.90/x
  3. Step 3: Cross multiply
    7,500.70x = 11,242.05 × 3,115.90
  4. Step 4: Simplify right side
    7,500.70x = 35,029,103.60
  5. Step 5: Solve for x
    x = 35,029,103.60/7,500.70
  6. Step 6: Final answer
    x = 4,670.11

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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.