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Finding the Fourth Proportional to 20,487.42, 30,731.73 and 8,006.94

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Solution

The fourth proportional to 20,487.42, 30,731.73 and 8,006.94 is: 12,010.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,487.42 : 30,731.73 = 8,006.94 : x
  2. Step 2: Convert to fraction form
    20,487.42/30,731.73 = 8,006.94/x
  3. Step 3: Cross multiply
    20,487.42x = 30,731.73 × 8,006.94
  4. Step 4: Simplify right side
    20,487.42x = 246,067,118.21
  5. Step 5: Solve for x
    x = 246,067,118.21/20,487.42
  6. Step 6: Final answer
    x = 12,010.64

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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.