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Finding the Fourth Proportional to 11,171.42, 15,418.46 and 6,458.44

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Solution

The fourth proportional to 11,171.42, 15,418.46 and 6,458.44 is: 8,913.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,171.42 : 15,418.46 = 6,458.44 : x
  2. Step 2: Convert to fraction form
    11,171.42/15,418.46 = 6,458.44/x
  3. Step 3: Cross multiply
    11,171.42x = 15,418.46 × 6,458.44
  4. Step 4: Simplify right side
    11,171.42x = 99,579,198.80
  5. Step 5: Solve for x
    x = 99,579,198.80/11,171.42
  6. Step 6: Final answer
    x = 8,913.75

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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.