Home / 2,107.20-2,910.96-2,020.80

Finding the Fourth Proportional to 2,107.20, 2,910.96 and 2,020.80

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Solution

The fourth proportional to 2,107.20, 2,910.96 and 2,020.80 is: 2,791.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,107.20 : 2,910.96 = 2,020.80 : x
  2. Step 2: Convert to fraction form
    2,107.20/2,910.96 = 2,020.80/x
  3. Step 3: Cross multiply
    2,107.20x = 2,910.96 × 2,020.80
  4. Step 4: Simplify right side
    2,107.20x = 5,882,467.97
  5. Step 5: Solve for x
    x = 5,882,467.97/2,107.20
  6. Step 6: Final answer
    x = 2,791.60

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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.