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Finding the Fourth Proportional to 16,391.16, 22,620.54 and 8,939.16

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Solution

The fourth proportional to 16,391.16, 22,620.54 and 8,939.16 is: 12,336.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,391.16 : 22,620.54 = 8,939.16 : x
  2. Step 2: Convert to fraction form
    16,391.16/22,620.54 = 8,939.16/x
  3. Step 3: Cross multiply
    16,391.16x = 22,620.54 × 8,939.16
  4. Step 4: Simplify right side
    16,391.16x = 202,208,626.35
  5. Step 5: Solve for x
    x = 202,208,626.35/16,391.16
  6. Step 6: Final answer
    x = 12,336.44

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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.