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Finding the Fourth Proportional to 3,940.06, 5,913.75 and 1,993.64

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Solution

The fourth proportional to 3,940.06, 5,913.75 and 1,993.64 is: 2,992.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.06 : 5,913.75 = 1,993.64 : x
  2. Step 2: Convert to fraction form
    3,940.06/5,913.75 = 1,993.64/x
  3. Step 3: Cross multiply
    3,940.06x = 5,913.75 × 1,993.64
  4. Step 4: Simplify right side
    3,940.06x = 11,789,888.55
  5. Step 5: Solve for x
    x = 11,789,888.55/3,940.06
  6. Step 6: Final answer
    x = 2,992.31

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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.