Home / 3,942.68-5,440.77-2,174.28

Finding the Fourth Proportional to 3,942.68, 5,440.77 and 2,174.28

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Solution

The fourth proportional to 3,942.68, 5,440.77 and 2,174.28 is: 3,000.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,942.68 : 5,440.77 = 2,174.28 : x
  2. Step 2: Convert to fraction form
    3,942.68/5,440.77 = 2,174.28/x
  3. Step 3: Cross multiply
    3,942.68x = 5,440.77 × 2,174.28
  4. Step 4: Simplify right side
    3,942.68x = 11,829,736.99
  5. Step 5: Solve for x
    x = 11,829,736.99/3,942.68
  6. Step 6: Final answer
    x = 3,000.43

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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.