Home / 3,918.55-5,877.86-1,321.48

Finding the Fourth Proportional to 3,918.55, 5,877.86 and 1,321.48

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Solution

The fourth proportional to 3,918.55, 5,877.86 and 1,321.48 is: 1,982.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.55 : 5,877.86 = 1,321.48 : x
  2. Step 2: Convert to fraction form
    3,918.55/5,877.86 = 1,321.48/x
  3. Step 3: Cross multiply
    3,918.55x = 5,877.86 × 1,321.48
  4. Step 4: Simplify right side
    3,918.55x = 7,767,474.43
  5. Step 5: Solve for x
    x = 7,767,474.43/3,918.55
  6. Step 6: Final answer
    x = 1,982.23

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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.