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Finding the Fourth Proportional to 19,785.87, 29,679.18 and 7,299.46

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Solution

The fourth proportional to 19,785.87, 29,679.18 and 7,299.46 is: 10,949.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,785.87 : 29,679.18 = 7,299.46 : x
  2. Step 2: Convert to fraction form
    19,785.87/29,679.18 = 7,299.46/x
  3. Step 3: Cross multiply
    19,785.87x = 29,679.18 × 7,299.46
  4. Step 4: Simplify right side
    19,785.87x = 216,641,950.75
  5. Step 5: Solve for x
    x = 216,641,950.75/19,785.87
  6. Step 6: Final answer
    x = 10,949.33

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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.