Home / 3,918.24-5,877.90-1,321.92

Finding the Fourth Proportional to 3,918.24, 5,877.90 and 1,321.92

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Solution

The fourth proportional to 3,918.24, 5,877.90 and 1,321.92 is: 1,983.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.24 : 5,877.90 = 1,321.92 : x
  2. Step 2: Convert to fraction form
    3,918.24/5,877.90 = 1,321.92/x
  3. Step 3: Cross multiply
    3,918.24x = 5,877.90 × 1,321.92
  4. Step 4: Simplify right side
    3,918.24x = 7,770,113.57
  5. Step 5: Solve for x
    x = 7,770,113.57/3,918.24
  6. Step 6: Final answer
    x = 1,983.06

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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.