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Finding the Fourth Proportional to 16,918.86, 25,363.70 and 8,141.70

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Solution

The fourth proportional to 16,918.86, 25,363.70 and 8,141.70 is: 12,205.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,918.86 : 25,363.70 = 8,141.70 : x
  2. Step 2: Convert to fraction form
    16,918.86/25,363.70 = 8,141.70/x
  3. Step 3: Cross multiply
    16,918.86x = 25,363.70 × 8,141.70
  4. Step 4: Simplify right side
    16,918.86x = 206,503,636.29
  5. Step 5: Solve for x
    x = 206,503,636.29/16,918.86
  6. Step 6: Final answer
    x = 12,205.53

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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.