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Finding the Fourth Proportional to 6,281.28, 8,660.16 and 3,922.56

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Solution

The fourth proportional to 6,281.28, 8,660.16 and 3,922.56 is: 5,408.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,281.28 : 8,660.16 = 3,922.56 : x
  2. Step 2: Convert to fraction form
    6,281.28/8,660.16 = 3,922.56/x
  3. Step 3: Cross multiply
    6,281.28x = 8,660.16 × 3,922.56
  4. Step 4: Simplify right side
    6,281.28x = 33,969,997.21
  5. Step 5: Solve for x
    x = 33,969,997.21/6,281.28
  6. Step 6: Final answer
    x = 5,408.13

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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.