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Finding the Fourth Proportional to 7,885.57, 11,825.46 and 2,619.62

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Solution

The fourth proportional to 7,885.57, 11,825.46 and 2,619.62 is: 3,928.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,885.57 : 11,825.46 = 2,619.62 : x
  2. Step 2: Convert to fraction form
    7,885.57/11,825.46 = 2,619.62/x
  3. Step 3: Cross multiply
    7,885.57x = 11,825.46 × 2,619.62
  4. Step 4: Simplify right side
    7,885.57x = 30,978,198.43
  5. Step 5: Solve for x
    x = 30,978,198.43/7,885.57
  6. Step 6: Final answer
    x = 3,928.47

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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.