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Finding the Fourth Proportional to 18,481.28, 27,721.94 and 4,630.28

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Solution

The fourth proportional to 18,481.28, 27,721.94 and 4,630.28 is: 6,945.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,481.28 : 27,721.94 = 4,630.28 : x
  2. Step 2: Convert to fraction form
    18,481.28/27,721.94 = 4,630.28/x
  3. Step 3: Cross multiply
    18,481.28x = 27,721.94 × 4,630.28
  4. Step 4: Simplify right side
    18,481.28x = 128,360,344.34
  5. Step 5: Solve for x
    x = 128,360,344.34/18,481.28
  6. Step 6: Final answer
    x = 6,945.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.