Home / 2,998.11-4,137.78-2,161.58

Finding the Fourth Proportional to 2,998.11, 4,137.78 and 2,161.58

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Solution

The fourth proportional to 2,998.11, 4,137.78 and 2,161.58 is: 2,983.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,998.11 : 4,137.78 = 2,161.58 : x
  2. Step 2: Convert to fraction form
    2,998.11/4,137.78 = 2,161.58/x
  3. Step 3: Cross multiply
    2,998.11x = 4,137.78 × 2,161.58
  4. Step 4: Simplify right side
    2,998.11x = 8,944,121.80
  5. Step 5: Solve for x
    x = 8,944,121.80/2,998.11
  6. Step 6: Final answer
    x = 2,983.25

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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.