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Finding the Fourth Proportional to 17,917.44, 26,878.02 and 8,555.88

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Solution

The fourth proportional to 17,917.44, 26,878.02 and 8,555.88 is: 12,834.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,917.44 : 26,878.02 = 8,555.88 : x
  2. Step 2: Convert to fraction form
    17,917.44/26,878.02 = 8,555.88/x
  3. Step 3: Cross multiply
    17,917.44x = 26,878.02 × 8,555.88
  4. Step 4: Simplify right side
    17,917.44x = 229,965,113.76
  5. Step 5: Solve for x
    x = 229,965,113.76/17,917.44
  6. Step 6: Final answer
    x = 12,834.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.