Home / 3,939.15-5,431.44-2,942.67

Finding the Fourth Proportional to 3,939.15, 5,431.44 and 2,942.67

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Solution

The fourth proportional to 3,939.15, 5,431.44 and 2,942.67 is: 4,057.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.15 : 5,431.44 = 2,942.67 : x
  2. Step 2: Convert to fraction form
    3,939.15/5,431.44 = 2,942.67/x
  3. Step 3: Cross multiply
    3,939.15x = 5,431.44 × 2,942.67
  4. Step 4: Simplify right side
    3,939.15x = 15,982,935.54
  5. Step 5: Solve for x
    x = 15,982,935.54/3,939.15
  6. Step 6: Final answer
    x = 4,057.46

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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.