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Finding the Fourth Proportional to 18,459.36, 27,660.69 and 12,528.54

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Solution

The fourth proportional to 18,459.36, 27,660.69 and 12,528.54 is: 18,773.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,459.36 : 27,660.69 = 12,528.54 : x
  2. Step 2: Convert to fraction form
    18,459.36/27,660.69 = 12,528.54/x
  3. Step 3: Cross multiply
    18,459.36x = 27,660.69 × 12,528.54
  4. Step 4: Simplify right side
    18,459.36x = 346,548,061.09
  5. Step 5: Solve for x
    x = 346,548,061.09/18,459.36
  6. Step 6: Final answer
    x = 18,773.57

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.