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Finding the Fourth Proportional to 8,550.99, 12,830.45 and 3,621.78

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Solution

The fourth proportional to 8,550.99, 12,830.45 and 3,621.78 is: 5,434.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,550.99 : 12,830.45 = 3,621.78 : x
  2. Step 2: Convert to fraction form
    8,550.99/12,830.45 = 3,621.78/x
  3. Step 3: Cross multiply
    8,550.99x = 12,830.45 × 3,621.78
  4. Step 4: Simplify right side
    8,550.99x = 46,469,049.09
  5. Step 5: Solve for x
    x = 46,469,049.09/8,550.99
  6. Step 6: Final answer
    x = 5,434.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.