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Finding the Fourth Proportional to 9,082.20, 13,620.90 and 2,842.20

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Solution

The fourth proportional to 9,082.20, 13,620.90 and 2,842.20 is: 4,262.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,082.20 : 13,620.90 = 2,842.20 : x
  2. Step 2: Convert to fraction form
    9,082.20/13,620.90 = 2,842.20/x
  3. Step 3: Cross multiply
    9,082.20x = 13,620.90 × 2,842.20
  4. Step 4: Simplify right side
    9,082.20x = 38,713,321.98
  5. Step 5: Solve for x
    x = 38,713,321.98/9,082.20
  6. Step 6: Final answer
    x = 4,262.55

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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.