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Finding the Fourth Proportional to 18,122.20, 27,183.30 and 15,818.20

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Solution

The fourth proportional to 18,122.20, 27,183.30 and 15,818.20 is: 23,727.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,122.20 : 27,183.30 = 15,818.20 : x
  2. Step 2: Convert to fraction form
    18,122.20/27,183.30 = 15,818.20/x
  3. Step 3: Cross multiply
    18,122.20x = 27,183.30 × 15,818.20
  4. Step 4: Simplify right side
    18,122.20x = 429,990,876.06
  5. Step 5: Solve for x
    x = 429,990,876.06/18,122.20
  6. Step 6: Final answer
    x = 23,727.30

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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.