Home / 5,121.90-7,067.70-2,883.42

Finding the Fourth Proportional to 5,121.90, 7,067.70 and 2,883.42

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Solution

The fourth proportional to 5,121.90, 7,067.70 and 2,883.42 is: 3,978.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.90 : 7,067.70 = 2,883.42 : x
  2. Step 2: Convert to fraction form
    5,121.90/7,067.70 = 2,883.42/x
  3. Step 3: Cross multiply
    5,121.90x = 7,067.70 × 2,883.42
  4. Step 4: Simplify right side
    5,121.90x = 20,379,147.53
  5. Step 5: Solve for x
    x = 20,379,147.53/5,121.90
  6. Step 6: Final answer
    x = 3,978.83

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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.