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Finding the Fourth Proportional to 6,380.80, 8,803.60 and 3,863.84

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Solution

The fourth proportional to 6,380.80, 8,803.60 and 3,863.84 is: 5,330.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,380.80 : 8,803.60 = 3,863.84 : x
  2. Step 2: Convert to fraction form
    6,380.80/8,803.60 = 3,863.84/x
  3. Step 3: Cross multiply
    6,380.80x = 8,803.60 × 3,863.84
  4. Step 4: Simplify right side
    6,380.80x = 34,015,701.82
  5. Step 5: Solve for x
    x = 34,015,701.82/6,380.80
  6. Step 6: Final answer
    x = 5,330.95

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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.