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Finding the Fourth Proportional to 12,000.70, 18,000.38 and 3,680.69

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Solution

The fourth proportional to 12,000.70, 18,000.38 and 3,680.69 is: 5,520.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,000.70 : 18,000.38 = 3,680.69 : x
  2. Step 2: Convert to fraction form
    12,000.70/18,000.38 = 3,680.69/x
  3. Step 3: Cross multiply
    12,000.70x = 18,000.38 × 3,680.69
  4. Step 4: Simplify right side
    12,000.70x = 66,253,845.26
  5. Step 5: Solve for x
    x = 66,253,845.26/12,000.70
  6. Step 6: Final answer
    x = 5,520.83

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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.