Home / 3,999.60-5,518.62-2,231.19

Finding the Fourth Proportional to 3,999.60, 5,518.62 and 2,231.19

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Solution

The fourth proportional to 3,999.60, 5,518.62 and 2,231.19 is: 3,078.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.60 : 5,518.62 = 2,231.19 : x
  2. Step 2: Convert to fraction form
    3,999.60/5,518.62 = 2,231.19/x
  3. Step 3: Cross multiply
    3,999.60x = 5,518.62 × 2,231.19
  4. Step 4: Simplify right side
    3,999.60x = 12,313,089.76
  5. Step 5: Solve for x
    x = 12,313,089.76/3,999.60
  6. Step 6: Final answer
    x = 3,078.58

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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.