Home / 3,912.40-5,868.91-1,139.11

Finding the Fourth Proportional to 3,912.40, 5,868.91 and 1,139.11

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Solution

The fourth proportional to 3,912.40, 5,868.91 and 1,139.11 is: 1,708.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912.40 : 5,868.91 = 1,139.11 : x
  2. Step 2: Convert to fraction form
    3,912.40/5,868.91 = 1,139.11/x
  3. Step 3: Cross multiply
    3,912.40x = 5,868.91 × 1,139.11
  4. Step 4: Simplify right side
    3,912.40x = 6,685,334.07
  5. Step 5: Solve for x
    x = 6,685,334.07/3,912.40
  6. Step 6: Final answer
    x = 1,708.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.