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Finding the Fourth Proportional to 27,309.78, 37,691.09 and 15,375.45

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Solution

The fourth proportional to 27,309.78, 37,691.09 and 15,375.45 is: 21,220.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,309.78 : 37,691.09 = 15,375.45 : x
  2. Step 2: Convert to fraction form
    27,309.78/37,691.09 = 15,375.45/x
  3. Step 3: Cross multiply
    27,309.78x = 37,691.09 × 15,375.45
  4. Step 4: Simplify right side
    27,309.78x = 579,517,392.86
  5. Step 5: Solve for x
    x = 579,517,392.86/27,309.78
  6. Step 6: Final answer
    x = 21,220.14

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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.