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Finding the Fourth Proportional to 18,511.92, 25,519.86 and 13,197.51

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Solution

The fourth proportional to 18,511.92, 25,519.86 and 13,197.51 is: 18,193.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,511.92 : 25,519.86 = 13,197.51 : x
  2. Step 2: Convert to fraction form
    18,511.92/25,519.86 = 13,197.51/x
  3. Step 3: Cross multiply
    18,511.92x = 25,519.86 × 13,197.51
  4. Step 4: Simplify right side
    18,511.92x = 336,798,607.55
  5. Step 5: Solve for x
    x = 336,798,607.55/18,511.92
  6. Step 6: Final answer
    x = 18,193.61

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.