Home / 5,179.21-7,147.24-2,821.37

Finding the Fourth Proportional to 5,179.21, 7,147.24 and 2,821.37

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Solution

The fourth proportional to 5,179.21, 7,147.24 and 2,821.37 is: 3,893.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.21 : 7,147.24 = 2,821.37 : x
  2. Step 2: Convert to fraction form
    5,179.21/7,147.24 = 2,821.37/x
  3. Step 3: Cross multiply
    5,179.21x = 7,147.24 × 2,821.37
  4. Step 4: Simplify right side
    5,179.21x = 20,164,965.73
  5. Step 5: Solve for x
    x = 20,164,965.73/5,179.21
  6. Step 6: Final answer
    x = 3,893.45

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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.