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Finding the Fourth Proportional to 13,487.21, 20,231.20 and 3,626.49

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Solution

The fourth proportional to 13,487.21, 20,231.20 and 3,626.49 is: 5,439.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,487.21 : 20,231.20 = 3,626.49 : x
  2. Step 2: Convert to fraction form
    13,487.21/20,231.20 = 3,626.49/x
  3. Step 3: Cross multiply
    13,487.21x = 20,231.20 × 3,626.49
  4. Step 4: Simplify right side
    13,487.21x = 73,368,257.59
  5. Step 5: Solve for x
    x = 73,368,257.59/13,487.21
  6. Step 6: Final answer
    x = 5,439.84

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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.