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Finding the Fourth Proportional to 5,791.01, 7,991.55 and 3,138.39

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Solution

The fourth proportional to 5,791.01, 7,991.55 and 3,138.39 is: 4,330.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,791.01 : 7,991.55 = 3,138.39 : x
  2. Step 2: Convert to fraction form
    5,791.01/7,991.55 = 3,138.39/x
  3. Step 3: Cross multiply
    5,791.01x = 7,991.55 × 3,138.39
  4. Step 4: Simplify right side
    5,791.01x = 25,080,600.60
  5. Step 5: Solve for x
    x = 25,080,600.60/5,791.01
  6. Step 6: Final answer
    x = 4,330.96

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1.5x scale

Why These Related Problems?

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