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Finding the Fourth Proportional to 13,418.97, 18,517.61 and 7,450.28

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Solution

The fourth proportional to 13,418.97, 18,517.61 and 7,450.28 is: 10,281.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,418.97 : 18,517.61 = 7,450.28 : x
  2. Step 2: Convert to fraction form
    13,418.97/18,517.61 = 7,450.28/x
  3. Step 3: Cross multiply
    13,418.97x = 18,517.61 × 7,450.28
  4. Step 4: Simplify right side
    13,418.97x = 137,961,374.91
  5. Step 5: Solve for x
    x = 137,961,374.91/13,418.97
  6. Step 6: Final answer
    x = 10,281.07

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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.