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Finding the Fourth Proportional to 3,993.71, 5,511.84 and 2,878.34

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Solution

The fourth proportional to 3,993.71, 5,511.84 and 2,878.34 is: 3,972.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,993.71 : 5,511.84 = 2,878.34 : x
  2. Step 2: Convert to fraction form
    3,993.71/5,511.84 = 2,878.34/x
  3. Step 3: Cross multiply
    3,993.71x = 5,511.84 × 2,878.34
  4. Step 4: Simplify right side
    3,993.71x = 15,864,921.99
  5. Step 5: Solve for x
    x = 15,864,921.99/3,993.71
  6. Step 6: Final answer
    x = 3,972.48

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.