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Finding the Fourth Proportional to 7,189.80, 10,764.68 and 3,672.20

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Solution

The fourth proportional to 7,189.80, 10,764.68 and 3,672.20 is: 5,498.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,189.80 : 10,764.68 = 3,672.20 : x
  2. Step 2: Convert to fraction form
    7,189.80/10,764.68 = 3,672.20/x
  3. Step 3: Cross multiply
    7,189.80x = 10,764.68 × 3,672.20
  4. Step 4: Simplify right side
    7,189.80x = 39,530,057.90
  5. Step 5: Solve for x
    x = 39,530,057.90/7,189.80
  6. Step 6: Final answer
    x = 5,498.07

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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.