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Finding the Fourth Proportional to 22,375.80, 30,879.50 and 12,817.26

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Solution

The fourth proportional to 22,375.80, 30,879.50 and 12,817.26 is: 17,688.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,375.80 : 30,879.50 = 12,817.26 : x
  2. Step 2: Convert to fraction form
    22,375.80/30,879.50 = 12,817.26/x
  3. Step 3: Cross multiply
    22,375.80x = 30,879.50 × 12,817.26
  4. Step 4: Simplify right side
    22,375.80x = 395,790,516.08
  5. Step 5: Solve for x
    x = 395,790,516.08/22,375.80
  6. Step 6: Final answer
    x = 17,688.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.