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Finding the Fourth Proportional to 19,872.56, 27,425.36 and 11,374.49

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Solution

The fourth proportional to 19,872.56, 27,425.36 and 11,374.49 is: 15,697.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,872.56 : 27,425.36 = 11,374.49 : x
  2. Step 2: Convert to fraction form
    19,872.56/27,425.36 = 11,374.49/x
  3. Step 3: Cross multiply
    19,872.56x = 27,425.36 × 11,374.49
  4. Step 4: Simplify right side
    19,872.56x = 311,949,432.37
  5. Step 5: Solve for x
    x = 311,949,432.37/19,872.56
  6. Step 6: Final answer
    x = 15,697.50

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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.