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Finding the Fourth Proportional to 20,479.96, 30,714.39 and 8,790.44

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Solution

The fourth proportional to 20,479.96, 30,714.39 and 8,790.44 is: 13,183.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,479.96 : 30,714.39 = 8,790.44 : x
  2. Step 2: Convert to fraction form
    20,479.96/30,714.39 = 8,790.44/x
  3. Step 3: Cross multiply
    20,479.96x = 30,714.39 × 8,790.44
  4. Step 4: Simplify right side
    20,479.96x = 269,993,002.43
  5. Step 5: Solve for x
    x = 269,993,002.43/20,479.96
  6. Step 6: Final answer
    x = 13,183.28

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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.