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Finding the Fourth Proportional to 13,222.55, 18,247.11 and 7,254.09

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Solution

The fourth proportional to 13,222.55, 18,247.11 and 7,254.09 is: 10,010.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,222.55 : 18,247.11 = 7,254.09 : x
  2. Step 2: Convert to fraction form
    13,222.55/18,247.11 = 7,254.09/x
  3. Step 3: Cross multiply
    13,222.55x = 18,247.11 × 7,254.09
  4. Step 4: Simplify right side
    13,222.55x = 132,366,178.18
  5. Step 5: Solve for x
    x = 132,366,178.18/13,222.55
  6. Step 6: Final answer
    x = 10,010.64

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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.