Home / 3,922.80-5,397.96-3,620.88

Finding the Fourth Proportional to 3,922.80, 5,397.96 and 3,620.88

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Solution

The fourth proportional to 3,922.80, 5,397.96 and 3,620.88 is: 4,982.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,922.80 : 5,397.96 = 3,620.88 : x
  2. Step 2: Convert to fraction form
    3,922.80/5,397.96 = 3,620.88/x
  3. Step 3: Cross multiply
    3,922.80x = 5,397.96 × 3,620.88
  4. Step 4: Simplify right side
    3,922.80x = 19,545,365.40
  5. Step 5: Solve for x
    x = 19,545,365.40/3,922.80
  6. Step 6: Final answer
    x = 4,982.50

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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.