Home / 3,998.60-5,518.17-2,230.55

Finding the Fourth Proportional to 3,998.60, 5,518.17 and 2,230.55

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Solution

The fourth proportional to 3,998.60, 5,518.17 and 2,230.55 is: 3,078.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,998.60 : 5,518.17 = 2,230.55 : x
  2. Step 2: Convert to fraction form
    3,998.60/5,518.17 = 2,230.55/x
  3. Step 3: Cross multiply
    3,998.60x = 5,518.17 × 2,230.55
  4. Step 4: Simplify right side
    3,998.60x = 12,308,526.50
  5. Step 5: Solve for x
    x = 12,308,526.50/3,998.60
  6. Step 6: Final answer
    x = 3,078.21

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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.