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Finding the Fourth Proportional to 6,385.50, 8,812.80 and 3,591.54

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Solution

The fourth proportional to 6,385.50, 8,812.80 and 3,591.54 is: 4,956.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,385.50 : 8,812.80 = 3,591.54 : x
  2. Step 2: Convert to fraction form
    6,385.50/8,812.80 = 3,591.54/x
  3. Step 3: Cross multiply
    6,385.50x = 8,812.80 × 3,591.54
  4. Step 4: Simplify right side
    6,385.50x = 31,651,523.71
  5. Step 5: Solve for x
    x = 31,651,523.71/6,385.50
  6. Step 6: Final answer
    x = 4,956.78

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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.