Home / 3,999.85-5,519.96-2,231.45

Finding the Fourth Proportional to 3,999.85, 5,519.96 and 2,231.45

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Solution

The fourth proportional to 3,999.85, 5,519.96 and 2,231.45 is: 3,079.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.85 : 5,519.96 = 2,231.45 : x
  2. Step 2: Convert to fraction form
    3,999.85/5,519.96 = 2,231.45/x
  3. Step 3: Cross multiply
    3,999.85x = 5,519.96 × 2,231.45
  4. Step 4: Simplify right side
    3,999.85x = 12,317,514.74
  5. Step 5: Solve for x
    x = 12,317,514.74/3,999.85
  6. Step 6: Final answer
    x = 3,079.49

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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.