Home / 3,918.45-5,391.21-3,422.28

Finding the Fourth Proportional to 3,918.45, 5,391.21 and 3,422.28

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Solution

The fourth proportional to 3,918.45, 5,391.21 and 3,422.28 is: 4,708.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.45 : 5,391.21 = 3,422.28 : x
  2. Step 2: Convert to fraction form
    3,918.45/5,391.21 = 3,422.28/x
  3. Step 3: Cross multiply
    3,918.45x = 5,391.21 × 3,422.28
  4. Step 4: Simplify right side
    3,918.45x = 18,450,230.16
  5. Step 5: Solve for x
    x = 18,450,230.16/3,918.45
  6. Step 6: Final answer
    x = 4,708.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.