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Finding the Fourth Proportional to 13,745.66, 20,591.96 and 8,203.44

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Solution

The fourth proportional to 13,745.66, 20,591.96 and 8,203.44 is: 12,289.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,745.66 : 20,591.96 = 8,203.44 : x
  2. Step 2: Convert to fraction form
    13,745.66/20,591.96 = 8,203.44/x
  3. Step 3: Cross multiply
    13,745.66x = 20,591.96 × 8,203.44
  4. Step 4: Simplify right side
    13,745.66x = 168,924,908.34
  5. Step 5: Solve for x
    x = 168,924,908.34/13,745.66
  6. Step 6: Final answer
    x = 12,289.33

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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.