Home / 2,668.20-3,998.10-2,118.96

Finding the Fourth Proportional to 2,668.20, 3,998.10 and 2,118.96

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Solution

The fourth proportional to 2,668.20, 3,998.10 and 2,118.96 is: 3,175.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,668.20 : 3,998.10 = 2,118.96 : x
  2. Step 2: Convert to fraction form
    2,668.20/3,998.10 = 2,118.96/x
  3. Step 3: Cross multiply
    2,668.20x = 3,998.10 × 2,118.96
  4. Step 4: Simplify right side
    2,668.20x = 8,471,813.98
  5. Step 5: Solve for x
    x = 8,471,813.98/2,668.20
  6. Step 6: Final answer
    x = 3,175.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.