Home / 3,999.12-5,518.72-2,230.92

Finding the Fourth Proportional to 3,999.12, 5,518.72 and 2,230.92

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Solution

The fourth proportional to 3,999.12, 5,518.72 and 2,230.92 is: 3,078.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.12 : 5,518.72 = 2,230.92 : x
  2. Step 2: Convert to fraction form
    3,999.12/5,518.72 = 2,230.92/x
  3. Step 3: Cross multiply
    3,999.12x = 5,518.72 × 2,230.92
  4. Step 4: Simplify right side
    3,999.12x = 12,311,822.82
  5. Step 5: Solve for x
    x = 12,311,822.82/3,999.12
  6. Step 6: Final answer
    x = 3,078.63

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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.