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Finding the Fourth Proportional to 20,280.70, 30,404.85 and 8,584.30

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Solution

The fourth proportional to 20,280.70, 30,404.85 and 8,584.30 is: 12,869.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.70 : 30,404.85 = 8,584.30 : x
  2. Step 2: Convert to fraction form
    20,280.70/30,404.85 = 8,584.30/x
  3. Step 3: Cross multiply
    20,280.70x = 30,404.85 × 8,584.30
  4. Step 4: Simplify right side
    20,280.70x = 261,004,353.86
  5. Step 5: Solve for x
    x = 261,004,353.86/20,280.70
  6. Step 6: Final answer
    x = 12,869.59

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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.