Home / 5,179.39-7,147.56-2,821.54

Finding the Fourth Proportional to 5,179.39, 7,147.56 and 2,821.54

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Solution

The fourth proportional to 5,179.39, 7,147.56 and 2,821.54 is: 3,893.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.39 : 7,147.56 = 2,821.54 : x
  2. Step 2: Convert to fraction form
    5,179.39/7,147.56 = 2,821.54/x
  3. Step 3: Cross multiply
    5,179.39x = 7,147.56 × 2,821.54
  4. Step 4: Simplify right side
    5,179.39x = 20,167,126.44
  5. Step 5: Solve for x
    x = 20,167,126.44/5,179.39
  6. Step 6: Final answer
    x = 3,893.73

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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.