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Finding the Fourth Proportional to 18,960.69, 28,382.70 and 12,372.69

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Solution

The fourth proportional to 18,960.69, 28,382.70 and 12,372.69 is: 18,520.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,960.69 : 28,382.70 = 12,372.69 : x
  2. Step 2: Convert to fraction form
    18,960.69/28,382.70 = 12,372.69/x
  3. Step 3: Cross multiply
    18,960.69x = 28,382.70 × 12,372.69
  4. Step 4: Simplify right side
    18,960.69x = 351,170,348.46
  5. Step 5: Solve for x
    x = 351,170,348.46/18,960.69
  6. Step 6: Final answer
    x = 18,520.97

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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.