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Finding the Fourth Proportional to 8,553.70, 12,832.35 and 3,620.80

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Solution

The fourth proportional to 8,553.70, 12,832.35 and 3,620.80 is: 5,431.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,553.70 : 12,832.35 = 3,620.80 : x
  2. Step 2: Convert to fraction form
    8,553.70/12,832.35 = 3,620.80/x
  3. Step 3: Cross multiply
    8,553.70x = 12,832.35 × 3,620.80
  4. Step 4: Simplify right side
    8,553.70x = 46,463,372.88
  5. Step 5: Solve for x
    x = 46,463,372.88/8,553.70
  6. Step 6: Final answer
    x = 5,431.96

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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.