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Finding the Fourth Proportional to 7,480.80, 11,221.30 and 3,584.30

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Solution

The fourth proportional to 7,480.80, 11,221.30 and 3,584.30 is: 5,376.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,480.80 : 11,221.30 = 3,584.30 : x
  2. Step 2: Convert to fraction form
    7,480.80/11,221.30 = 3,584.30/x
  3. Step 3: Cross multiply
    7,480.80x = 11,221.30 × 3,584.30
  4. Step 4: Simplify right side
    7,480.80x = 40,220,440.52
  5. Step 5: Solve for x
    x = 40,220,440.52/7,480.80
  6. Step 6: Final answer
    x = 5,376.49

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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.