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Finding the Fourth Proportional to 21,250.67, 31,874.39 and 7,399.67

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Solution

The fourth proportional to 21,250.67, 31,874.39 and 7,399.67 is: 11,098.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,250.67 : 31,874.39 = 7,399.67 : x
  2. Step 2: Convert to fraction form
    21,250.67/31,874.39 = 7,399.67/x
  3. Step 3: Cross multiply
    21,250.67x = 31,874.39 × 7,399.67
  4. Step 4: Simplify right side
    21,250.67x = 235,859,930.45
  5. Step 5: Solve for x
    x = 235,859,930.45/21,250.67
  6. Step 6: Final answer
    x = 11,098.94

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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.