Home / 3,940.43-5,437.80-2,147.90

Finding the Fourth Proportional to 3,940.43, 5,437.80 and 2,147.90

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Solution

The fourth proportional to 3,940.43, 5,437.80 and 2,147.90 is: 2,964.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.43 : 5,437.80 = 2,147.90 : x
  2. Step 2: Convert to fraction form
    3,940.43/5,437.80 = 2,147.90/x
  3. Step 3: Cross multiply
    3,940.43x = 5,437.80 × 2,147.90
  4. Step 4: Simplify right side
    3,940.43x = 11,679,823.43
  5. Step 5: Solve for x
    x = 11,679,823.43/3,940.43
  6. Step 6: Final answer
    x = 2,964.10

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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.