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Finding the Fourth Proportional to 11,591.15, 17,366.87 and 7,784.66

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Solution

The fourth proportional to 11,591.15, 17,366.87 and 7,784.66 is: 11,663.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,591.15 : 17,366.87 = 7,784.66 : x
  2. Step 2: Convert to fraction form
    11,591.15/17,366.87 = 7,784.66/x
  3. Step 3: Cross multiply
    11,591.15x = 17,366.87 × 7,784.66
  4. Step 4: Simplify right side
    11,591.15x = 135,195,052.46
  5. Step 5: Solve for x
    x = 135,195,052.46/11,591.15
  6. Step 6: Final answer
    x = 11,663.65

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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.