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Finding the Fourth Proportional to 15,991.17, 22,067.82 and 8,917.44

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Solution

The fourth proportional to 15,991.17, 22,067.82 and 8,917.44 is: 12,306.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,991.17 : 22,067.82 = 8,917.44 : x
  2. Step 2: Convert to fraction form
    15,991.17/22,067.82 = 8,917.44/x
  3. Step 3: Cross multiply
    15,991.17x = 22,067.82 × 8,917.44
  4. Step 4: Simplify right side
    15,991.17x = 196,788,477.08
  5. Step 5: Solve for x
    x = 196,788,477.08/15,991.17
  6. Step 6: Final answer
    x = 12,306.07

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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.