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Finding the Fourth Proportional to 15,172, 20,937.36 and 8,548

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Solution

The fourth proportional to 15,172, 20,937.36 and 8,548 is: 11,796.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,172 : 20,937.36 = 8,548 : x
  2. Step 2: Convert to fraction form
    15,172/20,937.36 = 8,548/x
  3. Step 3: Cross multiply
    15,172x = 20,937.36 × 8,548
  4. Step 4: Simplify right side
    15,172x = 178,972,553.28
  5. Step 5: Solve for x
    x = 178,972,553.28/15,172
  6. Step 6: Final answer
    x = 11,796.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.