Home / 3,821.80-5,720.55-2,728.30

Finding the Fourth Proportional to 3,821.80, 5,720.55 and 2,728.30

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Solution

The fourth proportional to 3,821.80, 5,720.55 and 2,728.30 is: 4,083.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,821.80 : 5,720.55 = 2,728.30 : x
  2. Step 2: Convert to fraction form
    3,821.80/5,720.55 = 2,728.30/x
  3. Step 3: Cross multiply
    3,821.80x = 5,720.55 × 2,728.30
  4. Step 4: Simplify right side
    3,821.80x = 15,607,376.57
  5. Step 5: Solve for x
    x = 15,607,376.57/3,821.80
  6. Step 6: Final answer
    x = 4,083.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.