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Finding the Fourth Proportional to 18,220.78, 27,331.20 and 5,908.78

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Solution

The fourth proportional to 18,220.78, 27,331.20 and 5,908.78 is: 8,863.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,220.78 : 27,331.20 = 5,908.78 : x
  2. Step 2: Convert to fraction form
    18,220.78/27,331.20 = 5,908.78/x
  3. Step 3: Cross multiply
    18,220.78x = 27,331.20 × 5,908.78
  4. Step 4: Simplify right side
    18,220.78x = 161,494,047.94
  5. Step 5: Solve for x
    x = 161,494,047.94/18,220.78
  6. Step 6: Final answer
    x = 8,863.18

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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.