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Finding the Fourth Proportional to 19,704.52, 27,192.20 and 11,321

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Solution

The fourth proportional to 19,704.52, 27,192.20 and 11,321 is: 15,622.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,704.52 : 27,192.20 = 11,321 : x
  2. Step 2: Convert to fraction form
    19,704.52/27,192.20 = 11,321/x
  3. Step 3: Cross multiply
    19,704.52x = 27,192.20 × 11,321
  4. Step 4: Simplify right side
    19,704.52x = 307,842,896.20
  5. Step 5: Solve for x
    x = 307,842,896.20/19,704.52
  6. Step 6: Final answer
    x = 15,622.96

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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.