Home / 3,990.69-5,507.09-2,198.13

Finding the Fourth Proportional to 3,990.69, 5,507.09 and 2,198.13

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Solution

The fourth proportional to 3,990.69, 5,507.09 and 2,198.13 is: 3,033.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.69 : 5,507.09 = 2,198.13 : x
  2. Step 2: Convert to fraction form
    3,990.69/5,507.09 = 2,198.13/x
  3. Step 3: Cross multiply
    3,990.69x = 5,507.09 × 2,198.13
  4. Step 4: Simplify right side
    3,990.69x = 12,105,319.68
  5. Step 5: Solve for x
    x = 12,105,319.68/3,990.69
  6. Step 6: Final answer
    x = 3,033.39

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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.