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Finding the Fourth Proportional to 8,909.72, 13,379.78 and 7,427.44

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Solution

The fourth proportional to 8,909.72, 13,379.78 and 7,427.44 is: 11,153.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,909.72 : 13,379.78 = 7,427.44 : x
  2. Step 2: Convert to fraction form
    8,909.72/13,379.78 = 7,427.44/x
  3. Step 3: Cross multiply
    8,909.72x = 13,379.78 × 7,427.44
  4. Step 4: Simplify right side
    8,909.72x = 99,377,513.16
  5. Step 5: Solve for x
    x = 99,377,513.16/8,909.72
  6. Step 6: Final answer
    x = 11,153.83

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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.