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Finding the Fourth Proportional to 20,081.80, 30,117.30 and 8,392.60

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Solution

The fourth proportional to 20,081.80, 30,117.30 and 8,392.60 is: 12,586.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,081.80 : 30,117.30 = 8,392.60 : x
  2. Step 2: Convert to fraction form
    20,081.80/30,117.30 = 8,392.60/x
  3. Step 3: Cross multiply
    20,081.80x = 30,117.30 × 8,392.60
  4. Step 4: Simplify right side
    20,081.80x = 252,762,451.98
  5. Step 5: Solve for x
    x = 252,762,451.98/20,081.80
  6. Step 6: Final answer
    x = 12,586.64

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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.