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Finding the Fourth Proportional to 19,691.17, 27,172.73 and 11,192.11

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Solution

The fourth proportional to 19,691.17, 27,172.73 and 11,192.11 is: 15,444.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,691.17 : 27,172.73 = 11,192.11 : x
  2. Step 2: Convert to fraction form
    19,691.17/27,172.73 = 11,192.11/x
  3. Step 3: Cross multiply
    19,691.17x = 27,172.73 × 11,192.11
  4. Step 4: Simplify right side
    19,691.17x = 304,120,219.63
  5. Step 5: Solve for x
    x = 304,120,219.63/19,691.17
  6. Step 6: Final answer
    x = 15,444.50

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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.