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Finding the Fourth Proportional to 13,344.56, 18,415.24 and 8,628.72

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Solution

The fourth proportional to 13,344.56, 18,415.24 and 8,628.72 is: 11,907.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,344.56 : 18,415.24 = 8,628.72 : x
  2. Step 2: Convert to fraction form
    13,344.56/18,415.24 = 8,628.72/x
  3. Step 3: Cross multiply
    13,344.56x = 18,415.24 × 8,628.72
  4. Step 4: Simplify right side
    13,344.56x = 158,899,949.69
  5. Step 5: Solve for x
    x = 158,899,949.69/13,344.56
  6. Step 6: Final answer
    x = 11,907.47

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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.