Home / 3,942.10-5,440.02-2,173.78

Finding the Fourth Proportional to 3,942.10, 5,440.02 and 2,173.78

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Solution

The fourth proportional to 3,942.10, 5,440.02 and 2,173.78 is: 2,999.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,942.10 : 5,440.02 = 2,173.78 : x
  2. Step 2: Convert to fraction form
    3,942.10/5,440.02 = 2,173.78/x
  3. Step 3: Cross multiply
    3,942.10x = 5,440.02 × 2,173.78
  4. Step 4: Simplify right side
    3,942.10x = 11,825,406.68
  5. Step 5: Solve for x
    x = 11,825,406.68/3,942.10
  6. Step 6: Final answer
    x = 2,999.77

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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.