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Finding the Fourth Proportional to 18,512.42, 25,520.55 and 13,198.01

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Solution

The fourth proportional to 18,512.42, 25,520.55 and 13,198.01 is: 18,194.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,512.42 : 25,520.55 = 13,198.01 : x
  2. Step 2: Convert to fraction form
    18,512.42/25,520.55 = 13,198.01/x
  3. Step 3: Cross multiply
    18,512.42x = 25,520.55 × 13,198.01
  4. Step 4: Simplify right side
    18,512.42x = 336,820,346.50
  5. Step 5: Solve for x
    x = 336,820,346.50/18,512.42
  6. Step 6: Final answer
    x = 18,194.30

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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.