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Finding the Fourth Proportional to 13,656.60, 20,491.92 and 11,819.52

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Solution

The fourth proportional to 13,656.60, 20,491.92 and 11,819.52 is: 17,735.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,656.60 : 20,491.92 = 11,819.52 : x
  2. Step 2: Convert to fraction form
    13,656.60/20,491.92 = 11,819.52/x
  3. Step 3: Cross multiply
    13,656.60x = 20,491.92 × 11,819.52
  4. Step 4: Simplify right side
    13,656.60x = 242,204,658.28
  5. Step 5: Solve for x
    x = 242,204,658.28/13,656.60
  6. Step 6: Final answer
    x = 17,735.36

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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.