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Finding the Fourth Proportional to 18,468.88, 25,487.64 and 11,395.12

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Solution

The fourth proportional to 18,468.88, 25,487.64 and 11,395.12 is: 15,725.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,468.88 : 25,487.64 = 11,395.12 : x
  2. Step 2: Convert to fraction form
    18,468.88/25,487.64 = 11,395.12/x
  3. Step 3: Cross multiply
    18,468.88x = 25,487.64 × 11,395.12
  4. Step 4: Simplify right side
    18,468.88x = 290,434,716.32
  5. Step 5: Solve for x
    x = 290,434,716.32/18,468.88
  6. Step 6: Final answer
    x = 15,725.63

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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.