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Finding the Fourth Proportional to 12,121.95, 18,183.77 and 4,723.95

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Solution

The fourth proportional to 12,121.95, 18,183.77 and 4,723.95 is: 7,086.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.95 : 18,183.77 = 4,723.95 : x
  2. Step 2: Convert to fraction form
    12,121.95/18,183.77 = 4,723.95/x
  3. Step 3: Cross multiply
    12,121.95x = 18,183.77 × 4,723.95
  4. Step 4: Simplify right side
    12,121.95x = 85,899,196.67
  5. Step 5: Solve for x
    x = 85,899,196.67/12,121.95
  6. Step 6: Final answer
    x = 7,086.25

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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.