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Finding the Fourth Proportional to 6,472.20, 8,931.36 and 3,958.56

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Solution

The fourth proportional to 6,472.20, 8,931.36 and 3,958.56 is: 5,462.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,472.20 : 8,931.36 = 3,958.56 : x
  2. Step 2: Convert to fraction form
    6,472.20/8,931.36 = 3,958.56/x
  3. Step 3: Cross multiply
    6,472.20x = 8,931.36 × 3,958.56
  4. Step 4: Simplify right side
    6,472.20x = 35,355,324.44
  5. Step 5: Solve for x
    x = 35,355,324.44/6,472.20
  6. Step 6: Final answer
    x = 5,462.64

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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.