Home / 15,991.32-22,067.38-8,917.56

Finding the Fourth Proportional to 15,991.32, 22,067.38 and 8,917.56

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Solution

The fourth proportional to 15,991.32, 22,067.38 and 8,917.56 is: 12,305.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,991.32 : 22,067.38 = 8,917.56 : x
  2. Step 2: Convert to fraction form
    15,991.32/22,067.38 = 8,917.56/x
  3. Step 3: Cross multiply
    15,991.32x = 22,067.38 × 8,917.56
  4. Step 4: Simplify right side
    15,991.32x = 196,787,185.19
  5. Step 5: Solve for x
    x = 196,787,185.19/15,991.32
  6. Step 6: Final answer
    x = 12,305.88

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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.