Home / 3,940.56-5,437.67-2,172.17

Finding the Fourth Proportional to 3,940.56, 5,437.67 and 2,172.17

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Solution

The fourth proportional to 3,940.56, 5,437.67 and 2,172.17 is: 2,997.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.56 : 5,437.67 = 2,172.17 : x
  2. Step 2: Convert to fraction form
    3,940.56/5,437.67 = 2,172.17/x
  3. Step 3: Cross multiply
    3,940.56x = 5,437.67 × 2,172.17
  4. Step 4: Simplify right side
    3,940.56x = 11,811,505.59
  5. Step 5: Solve for x
    x = 11,811,505.59/3,940.56
  6. Step 6: Final answer
    x = 2,997.42

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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.