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Finding the Fourth Proportional to 6,439.56, 8,882.54 and 3,919.88

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Solution

The fourth proportional to 6,439.56, 8,882.54 and 3,919.88 is: 5,406.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,439.56 : 8,882.54 = 3,919.88 : x
  2. Step 2: Convert to fraction form
    6,439.56/8,882.54 = 3,919.88/x
  3. Step 3: Cross multiply
    6,439.56x = 8,882.54 × 3,919.88
  4. Step 4: Simplify right side
    6,439.56x = 34,818,490.90
  5. Step 5: Solve for x
    x = 34,818,490.90/6,439.56
  6. Step 6: Final answer
    x = 5,406.97

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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.