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Finding the Fourth Proportional to 20,174, 27,840.12 and 11,342

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Solution

The fourth proportional to 20,174, 27,840.12 and 11,342 is: 15,651.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,174 : 27,840.12 = 11,342 : x
  2. Step 2: Convert to fraction form
    20,174/27,840.12 = 11,342/x
  3. Step 3: Cross multiply
    20,174x = 27,840.12 × 11,342
  4. Step 4: Simplify right side
    20,174x = 315,762,641.04
  5. Step 5: Solve for x
    x = 315,762,641.04/20,174
  6. Step 6: Final answer
    x = 15,651.96

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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.