Home / 15,991.25-22,067.61-8,821.81

Finding the Fourth Proportional to 15,991.25, 22,067.61 and 8,821.81

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Solution

The fourth proportional to 15,991.25, 22,067.61 and 8,821.81 is: 12,173.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,991.25 : 22,067.61 = 8,821.81 : x
  2. Step 2: Convert to fraction form
    15,991.25/22,067.61 = 8,821.81/x
  3. Step 3: Cross multiply
    15,991.25x = 22,067.61 × 8,821.81
  4. Step 4: Simplify right side
    15,991.25x = 194,676,257.08
  5. Step 5: Solve for x
    x = 194,676,257.08/15,991.25
  6. Step 6: Final answer
    x = 12,173.93

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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.