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Finding the Fourth Proportional to 33,390.66, 50,078.13 and 9,691.95

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Solution

The fourth proportional to 33,390.66, 50,078.13 and 9,691.95 is: 14,535.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,390.66 : 50,078.13 = 9,691.95 : x
  2. Step 2: Convert to fraction form
    33,390.66/50,078.13 = 9,691.95/x
  3. Step 3: Cross multiply
    33,390.66x = 50,078.13 × 9,691.95
  4. Step 4: Simplify right side
    33,390.66x = 485,354,732.05
  5. Step 5: Solve for x
    x = 485,354,732.05/33,390.66
  6. Step 6: Final answer
    x = 14,535.64

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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.