Home / 5,179.65-7,147.92-2,821.78

Finding the Fourth Proportional to 5,179.65, 7,147.92 and 2,821.78

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Solution

The fourth proportional to 5,179.65, 7,147.92 and 2,821.78 is: 3,894.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,179.65 : 7,147.92 = 2,821.78 : x
  2. Step 2: Convert to fraction form
    5,179.65/7,147.92 = 2,821.78/x
  3. Step 3: Cross multiply
    5,179.65x = 7,147.92 × 2,821.78
  4. Step 4: Simplify right side
    5,179.65x = 20,169,857.70
  5. Step 5: Solve for x
    x = 20,169,857.70/5,179.65
  6. Step 6: Final answer
    x = 3,894.06

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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.