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Finding the Fourth Proportional to 12,793.59, 17,658.90 and 8,317.80

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Solution

The fourth proportional to 12,793.59, 17,658.90 and 8,317.80 is: 11,481.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,793.59 : 17,658.90 = 8,317.80 : x
  2. Step 2: Convert to fraction form
    12,793.59/17,658.90 = 8,317.80/x
  3. Step 3: Cross multiply
    12,793.59x = 17,658.90 × 8,317.80
  4. Step 4: Simplify right side
    12,793.59x = 146,883,198.42
  5. Step 5: Solve for x
    x = 146,883,198.42/12,793.59
  6. Step 6: Final answer
    x = 11,481.00

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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.