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Finding the Fourth Proportional to 18,398.39, 25,388.33 and 10,440.61

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Solution

The fourth proportional to 18,398.39, 25,388.33 and 10,440.61 is: 14,407.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,398.39 : 25,388.33 = 10,440.61 : x
  2. Step 2: Convert to fraction form
    18,398.39/25,388.33 = 10,440.61/x
  3. Step 3: Cross multiply
    18,398.39x = 25,388.33 × 10,440.61
  4. Step 4: Simplify right side
    18,398.39x = 265,069,747.29
  5. Step 5: Solve for x
    x = 265,069,747.29/18,398.39
  6. Step 6: Final answer
    x = 14,407.23

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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.