Home / 3,999.28-5,518.97-2,206.78

Finding the Fourth Proportional to 3,999.28, 5,518.97 and 2,206.78

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Solution

The fourth proportional to 3,999.28, 5,518.97 and 2,206.78 is: 3,045.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.28 : 5,518.97 = 2,206.78 : x
  2. Step 2: Convert to fraction form
    3,999.28/5,518.97 = 2,206.78/x
  3. Step 3: Cross multiply
    3,999.28x = 5,518.97 × 2,206.78
  4. Step 4: Simplify right side
    3,999.28x = 12,179,144.34
  5. Step 5: Solve for x
    x = 12,179,144.34/3,999.28
  6. Step 6: Final answer
    x = 3,045.33

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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.