Home / 5,179.28-7,147.38-2,821.52

Finding the Fourth Proportional to 5,179.28, 7,147.38 and 2,821.52

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Solution

The fourth proportional to 5,179.28, 7,147.38 and 2,821.52 is: 3,893.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.28 : 7,147.38 = 2,821.52 : x
  2. Step 2: Convert to fraction form
    5,179.28/7,147.38 = 2,821.52/x
  3. Step 3: Cross multiply
    5,179.28x = 7,147.38 × 2,821.52
  4. Step 4: Simplify right side
    5,179.28x = 20,166,475.62
  5. Step 5: Solve for x
    x = 20,166,475.62/5,179.28
  6. Step 6: Final answer
    x = 3,893.68

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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.