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Finding the Fourth Proportional to 17,872.59, 26,811.63 and 5,390.97

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Solution

The fourth proportional to 17,872.59, 26,811.63 and 5,390.97 is: 8,087.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,872.59 : 26,811.63 = 5,390.97 : x
  2. Step 2: Convert to fraction form
    17,872.59/26,811.63 = 5,390.97/x
  3. Step 3: Cross multiply
    17,872.59x = 26,811.63 × 5,390.97
  4. Step 4: Simplify right side
    17,872.59x = 144,540,692.98
  5. Step 5: Solve for x
    x = 144,540,692.98/17,872.59
  6. Step 6: Final answer
    x = 8,087.28

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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.