Home / 3,912.78-5,869.08-1,139.34

Finding the Fourth Proportional to 3,912.78, 5,869.08 and 1,139.34

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Solution

The fourth proportional to 3,912.78, 5,869.08 and 1,139.34 is: 1,708.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912.78 : 5,869.08 = 1,139.34 : x
  2. Step 2: Convert to fraction form
    3,912.78/5,869.08 = 1,139.34/x
  3. Step 3: Cross multiply
    3,912.78x = 5,869.08 × 1,139.34
  4. Step 4: Simplify right side
    3,912.78x = 6,686,877.61
  5. Step 5: Solve for x
    x = 6,686,877.61/3,912.78
  6. Step 6: Final answer
    x = 1,708.98

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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.