Home / 3,940.41-5,437.55-2,171.71

Finding the Fourth Proportional to 3,940.41, 5,437.55 and 2,171.71

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Solution

The fourth proportional to 3,940.41, 5,437.55 and 2,171.71 is: 2,996.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.41 : 5,437.55 = 2,171.71 : x
  2. Step 2: Convert to fraction form
    3,940.41/5,437.55 = 2,171.71/x
  3. Step 3: Cross multiply
    3,940.41x = 5,437.55 × 2,171.71
  4. Step 4: Simplify right side
    3,940.41x = 11,808,743.66
  5. Step 5: Solve for x
    x = 11,808,743.66/3,940.41
  6. Step 6: Final answer
    x = 2,996.83

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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.