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Finding the Fourth Proportional to 18,958.52, 28,435.80 and 5,810.96

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Solution

The fourth proportional to 18,958.52, 28,435.80 and 5,810.96 is: 8,715.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,958.52 : 28,435.80 = 5,810.96 : x
  2. Step 2: Convert to fraction form
    18,958.52/28,435.80 = 5,810.96/x
  3. Step 3: Cross multiply
    18,958.52x = 28,435.80 × 5,810.96
  4. Step 4: Simplify right side
    18,958.52x = 165,239,296.37
  5. Step 5: Solve for x
    x = 165,239,296.37/18,958.52
  6. Step 6: Final answer
    x = 8,715.83

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Why These Related Problems?

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