Home / 3,999.89-5,519.79-2,231.52

Finding the Fourth Proportional to 3,999.89, 5,519.79 and 2,231.52

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Solution

The fourth proportional to 3,999.89, 5,519.79 and 2,231.52 is: 3,079.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.89 : 5,519.79 = 2,231.52 : x
  2. Step 2: Convert to fraction form
    3,999.89/5,519.79 = 2,231.52/x
  3. Step 3: Cross multiply
    3,999.89x = 5,519.79 × 2,231.52
  4. Step 4: Simplify right side
    3,999.89x = 12,317,521.78
  5. Step 5: Solve for x
    x = 12,317,521.78/3,999.89
  6. Step 6: Final answer
    x = 3,079.47

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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.