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Finding the Fourth Proportional to 20,398.46, 30,599.15 and 8,540.30

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Solution

The fourth proportional to 20,398.46, 30,599.15 and 8,540.30 is: 12,811.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,398.46 : 30,599.15 = 8,540.30 : x
  2. Step 2: Convert to fraction form
    20,398.46/30,599.15 = 8,540.30/x
  3. Step 3: Cross multiply
    20,398.46x = 30,599.15 × 8,540.30
  4. Step 4: Simplify right side
    20,398.46x = 261,325,725.05
  5. Step 5: Solve for x
    x = 261,325,725.05/20,398.46
  6. Step 6: Final answer
    x = 12,811.05

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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.