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Finding the Fourth Proportional to 18,272.62, 25,216.30 and 9,889.12

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Solution

The fourth proportional to 18,272.62, 25,216.30 and 9,889.12 is: 13,647.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,272.62 : 25,216.30 = 9,889.12 : x
  2. Step 2: Convert to fraction form
    18,272.62/25,216.30 = 9,889.12/x
  3. Step 3: Cross multiply
    18,272.62x = 25,216.30 × 9,889.12
  4. Step 4: Simplify right side
    18,272.62x = 249,367,016.66
  5. Step 5: Solve for x
    x = 249,367,016.66/18,272.62
  6. Step 6: Final answer
    x = 13,647.03

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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.