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Finding the Fourth Proportional to 6,418.44, 8,854.92 and 3,900.96

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Solution

The fourth proportional to 6,418.44, 8,854.92 and 3,900.96 is: 5,381.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,418.44 : 8,854.92 = 3,900.96 : x
  2. Step 2: Convert to fraction form
    6,418.44/8,854.92 = 3,900.96/x
  3. Step 3: Cross multiply
    6,418.44x = 8,854.92 × 3,900.96
  4. Step 4: Simplify right side
    6,418.44x = 34,542,688.72
  5. Step 5: Solve for x
    x = 34,542,688.72/6,418.44
  6. Step 6: Final answer
    x = 5,381.79

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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.