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Finding the Fourth Proportional to 13,883.20, 20,824.80 and 8,342.80

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Solution

The fourth proportional to 13,883.20, 20,824.80 and 8,342.80 is: 12,514.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,883.20 : 20,824.80 = 8,342.80 : x
  2. Step 2: Convert to fraction form
    13,883.20/20,824.80 = 8,342.80/x
  3. Step 3: Cross multiply
    13,883.20x = 20,824.80 × 8,342.80
  4. Step 4: Simplify right side
    13,883.20x = 173,737,141.44
  5. Step 5: Solve for x
    x = 173,737,141.44/13,883.20
  6. Step 6: Final answer
    x = 12,514.20

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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.