Home / 3,940.47-5,437.64-2,171.75

Finding the Fourth Proportional to 3,940.47, 5,437.64 and 2,171.75

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Solution

The fourth proportional to 3,940.47, 5,437.64 and 2,171.75 is: 2,996.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.47 : 5,437.64 = 2,171.75 : x
  2. Step 2: Convert to fraction form
    3,940.47/5,437.64 = 2,171.75/x
  3. Step 3: Cross multiply
    3,940.47x = 5,437.64 × 2,171.75
  4. Step 4: Simplify right side
    3,940.47x = 11,809,172.91
  5. Step 5: Solve for x
    x = 11,809,172.91/3,940.47
  6. Step 6: Final answer
    x = 2,996.89

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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.