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Finding the Fourth Proportional to 18,508.56, 27,755.21 and 7,108.77

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Solution

The fourth proportional to 18,508.56, 27,755.21 and 7,108.77 is: 10,660.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,508.56 : 27,755.21 = 7,108.77 : x
  2. Step 2: Convert to fraction form
    18,508.56/27,755.21 = 7,108.77/x
  3. Step 3: Cross multiply
    18,508.56x = 27,755.21 × 7,108.77
  4. Step 4: Simplify right side
    18,508.56x = 197,305,229.87
  5. Step 5: Solve for x
    x = 197,305,229.87/18,508.56
  6. Step 6: Final answer
    x = 10,660.22

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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.