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Finding the Fourth Proportional to 20,893.56, 28,832.59 and 11,694.98

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Solution

The fourth proportional to 20,893.56, 28,832.59 and 11,694.98 is: 16,138.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,893.56 : 28,832.59 = 11,694.98 : x
  2. Step 2: Convert to fraction form
    20,893.56/28,832.59 = 11,694.98/x
  3. Step 3: Cross multiply
    20,893.56x = 28,832.59 × 11,694.98
  4. Step 4: Simplify right side
    20,893.56x = 337,196,519.54
  5. Step 5: Solve for x
    x = 337,196,519.54/20,893.56
  6. Step 6: Final answer
    x = 16,138.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.