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Finding the Fourth Proportional to 13,836.60, 20,760.09 and 8,293.89

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Solution

The fourth proportional to 13,836.60, 20,760.09 and 8,293.89 is: 12,443.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,836.60 : 20,760.09 = 8,293.89 : x
  2. Step 2: Convert to fraction form
    13,836.60/20,760.09 = 8,293.89/x
  3. Step 3: Cross multiply
    13,836.60x = 20,760.09 × 8,293.89
  4. Step 4: Simplify right side
    13,836.60x = 172,181,902.85
  5. Step 5: Solve for x
    x = 172,181,902.85/13,836.60
  6. Step 6: Final answer
    x = 12,443.95

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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.