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Finding the Fourth Proportional to 35,993.82, 53,991.21 and 12,620.94

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Solution

The fourth proportional to 35,993.82, 53,991.21 and 12,620.94 is: 18,931.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,993.82 : 53,991.21 = 12,620.94 : x
  2. Step 2: Convert to fraction form
    35,993.82/53,991.21 = 12,620.94/x
  3. Step 3: Cross multiply
    35,993.82x = 53,991.21 × 12,620.94
  4. Step 4: Simplify right side
    35,993.82x = 681,419,821.94
  5. Step 5: Solve for x
    x = 681,419,821.94/35,993.82
  6. Step 6: Final answer
    x = 18,931.58

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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.