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Finding the Fourth Proportional to 16,918.70, 25,356.45 and 8,134.70

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Solution

The fourth proportional to 16,918.70, 25,356.45 and 8,134.70 is: 12,191.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,918.70 : 25,356.45 = 8,134.70 : x
  2. Step 2: Convert to fraction form
    16,918.70/25,356.45 = 8,134.70/x
  3. Step 3: Cross multiply
    16,918.70x = 25,356.45 × 8,134.70
  4. Step 4: Simplify right side
    16,918.70x = 206,267,113.82
  5. Step 5: Solve for x
    x = 206,267,113.82/16,918.70
  6. Step 6: Final answer
    x = 12,191.66

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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.