Home / 5,179.85-7,148.21-2,821.94

Finding the Fourth Proportional to 5,179.85, 7,148.21 and 2,821.94

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Solution

The fourth proportional to 5,179.85, 7,148.21 and 2,821.94 is: 3,894.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.85 : 7,148.21 = 2,821.94 : x
  2. Step 2: Convert to fraction form
    5,179.85/7,148.21 = 2,821.94/x
  3. Step 3: Cross multiply
    5,179.85x = 7,148.21 × 2,821.94
  4. Step 4: Simplify right side
    5,179.85x = 20,171,805.62
  5. Step 5: Solve for x
    x = 20,171,805.62/5,179.85
  6. Step 6: Final answer
    x = 3,894.28

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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.