Home / 3,940.56-5,437.80-2,172.14

Finding the Fourth Proportional to 3,940.56, 5,437.80 and 2,172.14

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Solution

The fourth proportional to 3,940.56, 5,437.80 and 2,172.14 is: 2,997.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.56 : 5,437.80 = 2,172.14 : x
  2. Step 2: Convert to fraction form
    3,940.56/5,437.80 = 2,172.14/x
  3. Step 3: Cross multiply
    3,940.56x = 5,437.80 × 2,172.14
  4. Step 4: Simplify right side
    3,940.56x = 11,811,662.89
  5. Step 5: Solve for x
    x = 11,811,662.89/3,940.56
  6. Step 6: Final answer
    x = 2,997.46

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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.