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Finding the Fourth Proportional to 18,276.29, 25,216.88 and 12,609.21

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Solution

The fourth proportional to 18,276.29, 25,216.88 and 12,609.21 is: 17,397.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,276.29 : 25,216.88 = 12,609.21 : x
  2. Step 2: Convert to fraction form
    18,276.29/25,216.88 = 12,609.21/x
  3. Step 3: Cross multiply
    18,276.29x = 25,216.88 × 12,609.21
  4. Step 4: Simplify right side
    18,276.29x = 317,964,872.42
  5. Step 5: Solve for x
    x = 317,964,872.42/18,276.29
  6. Step 6: Final answer
    x = 17,397.68

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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.