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Finding the Fourth Proportional to 18,511.60, 27,768.84 and 5,364.16

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Solution

The fourth proportional to 18,511.60, 27,768.84 and 5,364.16 is: 8,046.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,511.60 : 27,768.84 = 5,364.16 : x
  2. Step 2: Convert to fraction form
    18,511.60/27,768.84 = 5,364.16/x
  3. Step 3: Cross multiply
    18,511.60x = 27,768.84 × 5,364.16
  4. Step 4: Simplify right side
    18,511.60x = 148,956,500.77
  5. Step 5: Solve for x
    x = 148,956,500.77/18,511.60
  6. Step 6: Final answer
    x = 8,046.66

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