Home / 15,991.12-22,067.28-8,917.42

Finding the Fourth Proportional to 15,991.12, 22,067.28 and 8,917.42

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Solution

The fourth proportional to 15,991.12, 22,067.28 and 8,917.42 is: 12,305.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,991.12 : 22,067.28 = 8,917.42 : x
  2. Step 2: Convert to fraction form
    15,991.12/22,067.28 = 8,917.42/x
  3. Step 3: Cross multiply
    15,991.12x = 22,067.28 × 8,917.42
  4. Step 4: Simplify right side
    15,991.12x = 196,783,204.02
  5. Step 5: Solve for x
    x = 196,783,204.02/15,991.12
  6. Step 6: Final answer
    x = 12,305.78

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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.