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Finding the Fourth Proportional to 6,428.85, 8,855.94 and 5,481.55

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Solution

The fourth proportional to 6,428.85, 8,855.94 and 5,481.55 is: 7,551.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,428.85 : 8,855.94 = 5,481.55 : x
  2. Step 2: Convert to fraction form
    6,428.85/8,855.94 = 5,481.55/x
  3. Step 3: Cross multiply
    6,428.85x = 8,855.94 × 5,481.55
  4. Step 4: Simplify right side
    6,428.85x = 48,544,277.91
  5. Step 5: Solve for x
    x = 48,544,277.91/6,428.85
  6. Step 6: Final answer
    x = 7,551.00

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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.