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Finding the Fourth Proportional to 15,979.94, 22,052.42 and 8,906.41

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Solution

The fourth proportional to 15,979.94, 22,052.42 and 8,906.41 is: 12,290.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,979.94 : 22,052.42 = 8,906.41 : x
  2. Step 2: Convert to fraction form
    15,979.94/22,052.42 = 8,906.41/x
  3. Step 3: Cross multiply
    15,979.94x = 22,052.42 × 8,906.41
  4. Step 4: Simplify right side
    15,979.94x = 196,407,894.01
  5. Step 5: Solve for x
    x = 196,407,894.01/15,979.94
  6. Step 6: Final answer
    x = 12,290.90

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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.