Home / 4,021.20-5,538.87-2,840.22

Finding the Fourth Proportional to 4,021.20, 5,538.87 and 2,840.22

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Solution

The fourth proportional to 4,021.20, 5,538.87 and 2,840.22 is: 3,912.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,021.20 : 5,538.87 = 2,840.22 : x
  2. Step 2: Convert to fraction form
    4,021.20/5,538.87 = 2,840.22/x
  3. Step 3: Cross multiply
    4,021.20x = 5,538.87 × 2,840.22
  4. Step 4: Simplify right side
    4,021.20x = 15,731,609.35
  5. Step 5: Solve for x
    x = 15,731,609.35/4,021.20
  6. Step 6: Final answer
    x = 3,912.17

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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.