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Finding the Fourth Proportional to 8,505.56, 12,759.12 and 3,311.84

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Solution

The fourth proportional to 8,505.56, 12,759.12 and 3,311.84 is: 4,968.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,505.56 : 12,759.12 = 3,311.84 : x
  2. Step 2: Convert to fraction form
    8,505.56/12,759.12 = 3,311.84/x
  3. Step 3: Cross multiply
    8,505.56x = 12,759.12 × 3,311.84
  4. Step 4: Simplify right side
    8,505.56x = 42,256,163.98
  5. Step 5: Solve for x
    x = 42,256,163.98/8,505.56
  6. Step 6: Final answer
    x = 4,968.06

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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.