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Finding the Fourth Proportional to 7,212.87, 10,817.13 and 3,879.07

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Solution

The fourth proportional to 7,212.87, 10,817.13 and 3,879.07 is: 5,817.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,212.87 : 10,817.13 = 3,879.07 : x
  2. Step 2: Convert to fraction form
    7,212.87/10,817.13 = 3,879.07/x
  3. Step 3: Cross multiply
    7,212.87x = 10,817.13 × 3,879.07
  4. Step 4: Simplify right side
    7,212.87x = 41,960,404.47
  5. Step 5: Solve for x
    x = 41,960,404.47/7,212.87
  6. Step 6: Final answer
    x = 5,817.44

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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.