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Finding the Fourth Proportional to 13,747.21, 20,620.82 and 7,900.09

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Solution

The fourth proportional to 13,747.21, 20,620.82 and 7,900.09 is: 11,850.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,747.21 : 20,620.82 = 7,900.09 : x
  2. Step 2: Convert to fraction form
    13,747.21/20,620.82 = 7,900.09/x
  3. Step 3: Cross multiply
    13,747.21x = 20,620.82 × 7,900.09
  4. Step 4: Simplify right side
    13,747.21x = 162,906,333.87
  5. Step 5: Solve for x
    x = 162,906,333.87/13,747.21
  6. Step 6: Final answer
    x = 11,850.14

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Similar ratio
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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.