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Finding the Fourth Proportional to 13,469.21, 20,207 and 4,235.21

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Solution

The fourth proportional to 13,469.21, 20,207 and 4,235.21 is: 6,353.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,469.21 : 20,207 = 4,235.21 : x
  2. Step 2: Convert to fraction form
    13,469.21/20,207 = 4,235.21/x
  3. Step 3: Cross multiply
    13,469.21x = 20,207 × 4,235.21
  4. Step 4: Simplify right side
    13,469.21x = 85,580,888.47
  5. Step 5: Solve for x
    x = 85,580,888.47/13,469.21
  6. Step 6: Final answer
    x = 6,353.82

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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.