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Finding the Fourth Proportional to 15,979.80, 22,052.22 and 8,906.34

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Solution

The fourth proportional to 15,979.80, 22,052.22 and 8,906.34 is: 12,290.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,979.80 : 22,052.22 = 8,906.34 : x
  2. Step 2: Convert to fraction form
    15,979.80/22,052.22 = 8,906.34/x
  3. Step 3: Cross multiply
    15,979.80x = 22,052.22 × 8,906.34
  4. Step 4: Simplify right side
    15,979.80x = 196,404,569.07
  5. Step 5: Solve for x
    x = 196,404,569.07/15,979.80
  6. Step 6: Final answer
    x = 12,290.80

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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.