Home / 3,940.05-5,436.97-2,171.67

Finding the Fourth Proportional to 3,940.05, 5,436.97 and 2,171.67

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Solution

The fourth proportional to 3,940.05, 5,436.97 and 2,171.67 is: 2,996.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.05 : 5,436.97 = 2,171.67 : x
  2. Step 2: Convert to fraction form
    3,940.05/5,436.97 = 2,171.67/x
  3. Step 3: Cross multiply
    3,940.05x = 5,436.97 × 2,171.67
  4. Step 4: Simplify right side
    3,940.05x = 11,807,304.64
  5. Step 5: Solve for x
    x = 11,807,304.64/3,940.05
  6. Step 6: Final answer
    x = 2,996.74

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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.