Home / 3,999.20-5,520.83-3,100.95

Finding the Fourth Proportional to 3,999.20, 5,520.83 and 3,100.95

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Solution

The fourth proportional to 3,999.20, 5,520.83 and 3,100.95 is: 4,280.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.20 : 5,520.83 = 3,100.95 : x
  2. Step 2: Convert to fraction form
    3,999.20/5,520.83 = 3,100.95/x
  3. Step 3: Cross multiply
    3,999.20x = 5,520.83 × 3,100.95
  4. Step 4: Simplify right side
    3,999.20x = 17,119,802.28
  5. Step 5: Solve for x
    x = 17,119,802.28/3,999.20
  6. Step 6: Final answer
    x = 4,280.81

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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.