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Finding the Fourth Proportional to 12,480.85, 18,715.03 and 4,157.96

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Solution

The fourth proportional to 12,480.85, 18,715.03 and 4,157.96 is: 6,234.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,480.85 : 18,715.03 = 4,157.96 : x
  2. Step 2: Convert to fraction form
    12,480.85/18,715.03 = 4,157.96/x
  3. Step 3: Cross multiply
    12,480.85x = 18,715.03 × 4,157.96
  4. Step 4: Simplify right side
    12,480.85x = 77,816,382.53
  5. Step 5: Solve for x
    x = 77,816,382.53/12,480.85
  6. Step 6: Final answer
    x = 6,234.86

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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.