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Finding the Fourth Proportional to 16,391.87, 22,620.22 and 9,221.93

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Solution

The fourth proportional to 16,391.87, 22,620.22 and 9,221.93 is: 12,725.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,391.87 : 22,620.22 = 9,221.93 : x
  2. Step 2: Convert to fraction form
    16,391.87/22,620.22 = 9,221.93/x
  3. Step 3: Cross multiply
    16,391.87x = 22,620.22 × 9,221.93
  4. Step 4: Simplify right side
    16,391.87x = 208,601,949.27
  5. Step 5: Solve for x
    x = 208,601,949.27/16,391.87
  6. Step 6: Final answer
    x = 12,725.94

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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.