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Finding the Fourth Proportional to 7,336.80, 11,008.80 and 5,581.20

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Solution

The fourth proportional to 7,336.80, 11,008.80 and 5,581.20 is: 8,374.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,336.80 : 11,008.80 = 5,581.20 : x
  2. Step 2: Convert to fraction form
    7,336.80/11,008.80 = 5,581.20/x
  3. Step 3: Cross multiply
    7,336.80x = 11,008.80 × 5,581.20
  4. Step 4: Simplify right side
    7,336.80x = 61,442,314.56
  5. Step 5: Solve for x
    x = 61,442,314.56/7,336.80
  6. Step 6: Final answer
    x = 8,374.54

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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.