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Finding the Fourth Proportional to 18,385.92, 27,578.40 and 5,906.80

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Solution

The fourth proportional to 18,385.92, 27,578.40 and 5,906.80 is: 8,860.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,385.92 : 27,578.40 = 5,906.80 : x
  2. Step 2: Convert to fraction form
    18,385.92/27,578.40 = 5,906.80/x
  3. Step 3: Cross multiply
    18,385.92x = 27,578.40 × 5,906.80
  4. Step 4: Simplify right side
    18,385.92x = 162,900,093.12
  5. Step 5: Solve for x
    x = 162,900,093.12/18,385.92
  6. Step 6: Final answer
    x = 8,860.05

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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.