Home / 7,141.54-9,855.27-3,997.78

Finding the Fourth Proportional to 7,141.54, 9,855.27 and 3,997.78

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Solution

The fourth proportional to 7,141.54, 9,855.27 and 3,997.78 is: 5,516.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,141.54 : 9,855.27 = 3,997.78 : x
  2. Step 2: Convert to fraction form
    7,141.54/9,855.27 = 3,997.78/x
  3. Step 3: Cross multiply
    7,141.54x = 9,855.27 × 3,997.78
  4. Step 4: Simplify right side
    7,141.54x = 39,399,201.30
  5. Step 5: Solve for x
    x = 39,399,201.30/7,141.54
  6. Step 6: Final answer
    x = 5,516.91

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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.