Home / 3,940.46-5,437.85-2,172.03

Finding the Fourth Proportional to 3,940.46, 5,437.85 and 2,172.03

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Solution

The fourth proportional to 3,940.46, 5,437.85 and 2,172.03 is: 2,997.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.46 : 5,437.85 = 2,172.03 : x
  2. Step 2: Convert to fraction form
    3,940.46/5,437.85 = 2,172.03/x
  3. Step 3: Cross multiply
    3,940.46x = 5,437.85 × 2,172.03
  4. Step 4: Simplify right side
    3,940.46x = 11,811,142.08
  5. Step 5: Solve for x
    x = 11,811,142.08/3,940.46
  6. Step 6: Final answer
    x = 2,997.40

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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.