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Finding the Fourth Proportional to 20,487.72, 30,730.08 and 8,005.44

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Solution

The fourth proportional to 20,487.72, 30,730.08 and 8,005.44 is: 12,007.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,487.72 : 30,730.08 = 8,005.44 : x
  2. Step 2: Convert to fraction form
    20,487.72/30,730.08 = 8,005.44/x
  3. Step 3: Cross multiply
    20,487.72x = 30,730.08 × 8,005.44
  4. Step 4: Simplify right side
    20,487.72x = 246,007,811.64
  5. Step 5: Solve for x
    x = 246,007,811.64/20,487.72
  6. Step 6: Final answer
    x = 12,007.57

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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.