Home / 3,912.66-5,869.90-1,139.63

Finding the Fourth Proportional to 3,912.66, 5,869.90 and 1,139.63

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Solution

The fourth proportional to 3,912.66, 5,869.90 and 1,139.63 is: 1,709.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912.66 : 5,869.90 = 1,139.63 : x
  2. Step 2: Convert to fraction form
    3,912.66/5,869.90 = 1,139.63/x
  3. Step 3: Cross multiply
    3,912.66x = 5,869.90 × 1,139.63
  4. Step 4: Simplify right side
    3,912.66x = 6,689,481.94
  5. Step 5: Solve for x
    x = 6,689,481.94/3,912.66
  6. Step 6: Final answer
    x = 1,709.70

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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.