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Finding the Fourth Proportional to 17,190.76, 25,791.02 and 8,428.20

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Solution

The fourth proportional to 17,190.76, 25,791.02 and 8,428.20 is: 12,644.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,190.76 : 25,791.02 = 8,428.20 : x
  2. Step 2: Convert to fraction form
    17,190.76/25,791.02 = 8,428.20/x
  3. Step 3: Cross multiply
    17,190.76x = 25,791.02 × 8,428.20
  4. Step 4: Simplify right side
    17,190.76x = 217,371,874.76
  5. Step 5: Solve for x
    x = 217,371,874.76/17,190.76
  6. Step 6: Final answer
    x = 12,644.69

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1.5x scale

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.