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Finding the Fourth Proportional to 7,222.60, 10,825.80 and 3,061.90

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Solution

The fourth proportional to 7,222.60, 10,825.80 and 3,061.90 is: 4,589.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,222.60 : 10,825.80 = 3,061.90 : x
  2. Step 2: Convert to fraction form
    7,222.60/10,825.80 = 3,061.90/x
  3. Step 3: Cross multiply
    7,222.60x = 10,825.80 × 3,061.90
  4. Step 4: Simplify right side
    7,222.60x = 33,147,517.02
  5. Step 5: Solve for x
    x = 33,147,517.02/7,222.60
  6. Step 6: Final answer
    x = 4,589.42

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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.