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Finding the Fourth Proportional to 7,761.28, 10,711 and 4,224.42

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Solution

The fourth proportional to 7,761.28, 10,711 and 4,224.42 is: 5,829.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,761.28 : 10,711 = 4,224.42 : x
  2. Step 2: Convert to fraction form
    7,761.28/10,711 = 4,224.42/x
  3. Step 3: Cross multiply
    7,761.28x = 10,711 × 4,224.42
  4. Step 4: Simplify right side
    7,761.28x = 45,247,762.62
  5. Step 5: Solve for x
    x = 45,247,762.62/7,761.28
  6. Step 6: Final answer
    x = 5,829.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.