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Finding the Fourth Proportional to 8,591.72, 11,856.64 and 4,815.02

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Solution

The fourth proportional to 8,591.72, 11,856.64 and 4,815.02 is: 6,644.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,591.72 : 11,856.64 = 4,815.02 : x
  2. Step 2: Convert to fraction form
    8,591.72/11,856.64 = 4,815.02/x
  3. Step 3: Cross multiply
    8,591.72x = 11,856.64 × 4,815.02
  4. Step 4: Simplify right side
    8,591.72x = 57,089,958.73
  5. Step 5: Solve for x
    x = 57,089,958.73/8,591.72
  6. Step 6: Final answer
    x = 6,644.76

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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.