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Finding the Fourth Proportional to 20,487.90, 30,732.46 and 8,007.42

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Solution

The fourth proportional to 20,487.90, 30,732.46 and 8,007.42 is: 12,011.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,487.90 : 30,732.46 = 8,007.42 : x
  2. Step 2: Convert to fraction form
    20,487.90/30,732.46 = 8,007.42/x
  3. Step 3: Cross multiply
    20,487.90x = 30,732.46 × 8,007.42
  4. Step 4: Simplify right side
    20,487.90x = 246,087,714.85
  5. Step 5: Solve for x
    x = 246,087,714.85/20,487.90
  6. Step 6: Final answer
    x = 12,011.37

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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.