Home / 5,179.80-7,148.13-2,821.95

Finding the Fourth Proportional to 5,179.80, 7,148.13 and 2,821.95

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Solution

The fourth proportional to 5,179.80, 7,148.13 and 2,821.95 is: 3,894.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.80 : 7,148.13 = 2,821.95 : x
  2. Step 2: Convert to fraction form
    5,179.80/7,148.13 = 2,821.95/x
  3. Step 3: Cross multiply
    5,179.80x = 7,148.13 × 2,821.95
  4. Step 4: Simplify right side
    5,179.80x = 20,171,665.45
  5. Step 5: Solve for x
    x = 20,171,665.45/5,179.80
  6. Step 6: Final answer
    x = 3,894.29

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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.