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Finding the Fourth Proportional to 20,487.78, 30,732.30 and 8,007.30

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Solution

The fourth proportional to 20,487.78, 30,732.30 and 8,007.30 is: 12,011.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,487.78 : 30,732.30 = 8,007.30 : x
  2. Step 2: Convert to fraction form
    20,487.78/30,732.30 = 8,007.30/x
  3. Step 3: Cross multiply
    20,487.78x = 30,732.30 × 8,007.30
  4. Step 4: Simplify right side
    20,487.78x = 246,082,745.79
  5. Step 5: Solve for x
    x = 246,082,745.79/20,487.78
  6. Step 6: Final answer
    x = 12,011.20

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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.