Home / 5,179.19-7,147.46-2,821.55

Finding the Fourth Proportional to 5,179.19, 7,147.46 and 2,821.55

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Solution

The fourth proportional to 5,179.19, 7,147.46 and 2,821.55 is: 3,893.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.19 : 7,147.46 = 2,821.55 : x
  2. Step 2: Convert to fraction form
    5,179.19/7,147.46 = 2,821.55/x
  3. Step 3: Cross multiply
    5,179.19x = 7,147.46 × 2,821.55
  4. Step 4: Simplify right side
    5,179.19x = 20,166,901.66
  5. Step 5: Solve for x
    x = 20,166,901.66/5,179.19
  6. Step 6: Final answer
    x = 3,893.83

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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.