Home / 3,999.35-5,519.21-2,231.30

Finding the Fourth Proportional to 3,999.35, 5,519.21 and 2,231.30

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Solution

The fourth proportional to 3,999.35, 5,519.21 and 2,231.30 is: 3,079.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.35 : 5,519.21 = 2,231.30 : x
  2. Step 2: Convert to fraction form
    3,999.35/5,519.21 = 2,231.30/x
  3. Step 3: Cross multiply
    3,999.35x = 5,519.21 × 2,231.30
  4. Step 4: Simplify right side
    3,999.35x = 12,314,974.52
  5. Step 5: Solve for x
    x = 12,314,974.52/3,999.35
  6. Step 6: Final answer
    x = 3,079.25

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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.