Home / 3,940.53-5,437.88-2,172.09

Finding the Fourth Proportional to 3,940.53, 5,437.88 and 2,172.09

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Solution

The fourth proportional to 3,940.53, 5,437.88 and 2,172.09 is: 2,997.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.53 : 5,437.88 = 2,172.09 : x
  2. Step 2: Convert to fraction form
    3,940.53/5,437.88 = 2,172.09/x
  3. Step 3: Cross multiply
    3,940.53x = 5,437.88 × 2,172.09
  4. Step 4: Simplify right side
    3,940.53x = 11,811,553.91
  5. Step 5: Solve for x
    x = 11,811,553.91/3,940.53
  6. Step 6: Final answer
    x = 2,997.45

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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.