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Finding the Fourth Proportional to 7,520.40, 11,282.40 and 3,135.60

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Solution

The fourth proportional to 7,520.40, 11,282.40 and 3,135.60 is: 4,704.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,520.40 : 11,282.40 = 3,135.60 : x
  2. Step 2: Convert to fraction form
    7,520.40/11,282.40 = 3,135.60/x
  3. Step 3: Cross multiply
    7,520.40x = 11,282.40 × 3,135.60
  4. Step 4: Simplify right side
    7,520.40x = 35,377,093.44
  5. Step 5: Solve for x
    x = 35,377,093.44/7,520.40
  6. Step 6: Final answer
    x = 4,704.15

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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.