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Finding the Fourth Proportional to 18,628.52, 27,943.25 and 6,939.41

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Solution

The fourth proportional to 18,628.52, 27,943.25 and 6,939.41 is: 10,409.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,628.52 : 27,943.25 = 6,939.41 : x
  2. Step 2: Convert to fraction form
    18,628.52/27,943.25 = 6,939.41/x
  3. Step 3: Cross multiply
    18,628.52x = 27,943.25 × 6,939.41
  4. Step 4: Simplify right side
    18,628.52x = 193,909,494.07
  5. Step 5: Solve for x
    x = 193,909,494.07/18,628.52
  6. Step 6: Final answer
    x = 10,409.28

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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.