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Finding the Fourth Proportional to 20,568.20, 30,866.70 and 8,889.80

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Solution

The fourth proportional to 20,568.20, 30,866.70 and 8,889.80 is: 13,340.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,568.20 : 30,866.70 = 8,889.80 : x
  2. Step 2: Convert to fraction form
    20,568.20/30,866.70 = 8,889.80/x
  3. Step 3: Cross multiply
    20,568.20x = 30,866.70 × 8,889.80
  4. Step 4: Simplify right side
    20,568.20x = 274,398,789.66
  5. Step 5: Solve for x
    x = 274,398,789.66/20,568.20
  6. Step 6: Final answer
    x = 13,340.92

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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.