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Finding the Fourth Proportional to 7,200.11, 10,800.17 and 2,814.50

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Solution

The fourth proportional to 7,200.11, 10,800.17 and 2,814.50 is: 4,221.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,200.11 : 10,800.17 = 2,814.50 : x
  2. Step 2: Convert to fraction form
    7,200.11/10,800.17 = 2,814.50/x
  3. Step 3: Cross multiply
    7,200.11x = 10,800.17 × 2,814.50
  4. Step 4: Simplify right side
    7,200.11x = 30,397,078.47
  5. Step 5: Solve for x
    x = 30,397,078.47/7,200.11
  6. Step 6: Final answer
    x = 4,221.75

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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.