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Finding the Fourth Proportional to 18,905.05, 28,163.57 and 18,052.12

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Solution

The fourth proportional to 18,905.05, 28,163.57 and 18,052.12 is: 26,892.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,905.05 : 28,163.57 = 18,052.12 : x
  2. Step 2: Convert to fraction form
    18,905.05/28,163.57 = 18,052.12/x
  3. Step 3: Cross multiply
    18,905.05x = 28,163.57 × 18,052.12
  4. Step 4: Simplify right side
    18,905.05x = 508,412,145.27
  5. Step 5: Solve for x
    x = 508,412,145.27/18,905.05
  6. Step 6: Final answer
    x = 26,892.93

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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.