Home / 3,642.20-5,455.20-2,817.80

Finding the Fourth Proportional to 3,642.20, 5,455.20 and 2,817.80

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Solution

The fourth proportional to 3,642.20, 5,455.20 and 2,817.80 is: 4,220.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,642.20 : 5,455.20 = 2,817.80 : x
  2. Step 2: Convert to fraction form
    3,642.20/5,455.20 = 2,817.80/x
  3. Step 3: Cross multiply
    3,642.20x = 5,455.20 × 2,817.80
  4. Step 4: Simplify right side
    3,642.20x = 15,371,662.56
  5. Step 5: Solve for x
    x = 15,371,662.56/3,642.20
  6. Step 6: Final answer
    x = 4,220.43

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1.5x scale

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.