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Finding the Fourth Proportional to 18,486.65, 25,530.21 and 11,775.29

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Solution

The fourth proportional to 18,486.65, 25,530.21 and 11,775.29 is: 16,261.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,486.65 : 25,530.21 = 11,775.29 : x
  2. Step 2: Convert to fraction form
    18,486.65/25,530.21 = 11,775.29/x
  3. Step 3: Cross multiply
    18,486.65x = 25,530.21 × 11,775.29
  4. Step 4: Simplify right side
    18,486.65x = 300,625,498.86
  5. Step 5: Solve for x
    x = 300,625,498.86/18,486.65
  6. Step 6: Final answer
    x = 16,261.77

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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.