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Finding the Fourth Proportional to 18,822.20, 28,244.22 and 8,433.95

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Solution

The fourth proportional to 18,822.20, 28,244.22 and 8,433.95 is: 12,655.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,822.20 : 28,244.22 = 8,433.95 : x
  2. Step 2: Convert to fraction form
    18,822.20/28,244.22 = 8,433.95/x
  3. Step 3: Cross multiply
    18,822.20x = 28,244.22 × 8,433.95
  4. Step 4: Simplify right side
    18,822.20x = 238,210,198.05
  5. Step 5: Solve for x
    x = 238,210,198.05/18,822.20
  6. Step 6: Final answer
    x = 12,655.81

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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.