Home / 3,940.66-5,437.89-2,171.96

Finding the Fourth Proportional to 3,940.66, 5,437.89 and 2,171.96

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Solution

The fourth proportional to 3,940.66, 5,437.89 and 2,171.96 is: 2,997.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.66 : 5,437.89 = 2,171.96 : x
  2. Step 2: Convert to fraction form
    3,940.66/5,437.89 = 2,171.96/x
  3. Step 3: Cross multiply
    3,940.66x = 5,437.89 × 2,171.96
  4. Step 4: Simplify right side
    3,940.66x = 11,810,852.37
  5. Step 5: Solve for x
    x = 11,810,852.37/3,940.66
  6. Step 6: Final answer
    x = 2,997.18

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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.