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Finding the Fourth Proportional to 10,891.94, 16,340.64 and 3,100.75

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Solution

The fourth proportional to 10,891.94, 16,340.64 and 3,100.75 is: 4,651.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,891.94 : 16,340.64 = 3,100.75 : x
  2. Step 2: Convert to fraction form
    10,891.94/16,340.64 = 3,100.75/x
  3. Step 3: Cross multiply
    10,891.94x = 16,340.64 × 3,100.75
  4. Step 4: Simplify right side
    10,891.94x = 50,668,239.48
  5. Step 5: Solve for x
    x = 50,668,239.48/10,891.94
  6. Step 6: Final answer
    x = 4,651.90

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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.