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Finding the Fourth Proportional to 18,356.35, 25,335.80 and 12,069.31

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Solution

The fourth proportional to 18,356.35, 25,335.80 and 12,069.31 is: 16,658.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,356.35 : 25,335.80 = 12,069.31 : x
  2. Step 2: Convert to fraction form
    18,356.35/25,335.80 = 12,069.31/x
  3. Step 3: Cross multiply
    18,356.35x = 25,335.80 × 12,069.31
  4. Step 4: Simplify right side
    18,356.35x = 305,785,624.30
  5. Step 5: Solve for x
    x = 305,785,624.30/18,356.35
  6. Step 6: Final answer
    x = 16,658.30

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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.