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Finding the Fourth Proportional to 18,408.84, 25,399.79 and 10,854.58

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Solution

The fourth proportional to 18,408.84, 25,399.79 and 10,854.58 is: 14,976.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,408.84 : 25,399.79 = 10,854.58 : x
  2. Step 2: Convert to fraction form
    18,408.84/25,399.79 = 10,854.58/x
  3. Step 3: Cross multiply
    18,408.84x = 25,399.79 × 10,854.58
  4. Step 4: Simplify right side
    18,408.84x = 275,703,975.47
  5. Step 5: Solve for x
    x = 275,703,975.47/18,408.84
  6. Step 6: Final answer
    x = 14,976.72

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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.