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Finding the Fourth Proportional to 12,793.72, 17,651.64 and 8,079.52

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Solution

The fourth proportional to 12,793.72, 17,651.64 and 8,079.52 is: 11,147.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,793.72 : 17,651.64 = 8,079.52 : x
  2. Step 2: Convert to fraction form
    12,793.72/17,651.64 = 8,079.52/x
  3. Step 3: Cross multiply
    12,793.72x = 17,651.64 × 8,079.52
  4. Step 4: Simplify right side
    12,793.72x = 142,616,778.41
  5. Step 5: Solve for x
    x = 142,616,778.41/12,793.72
  6. Step 6: Final answer
    x = 11,147.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.