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Finding the Fourth Proportional to 27,308.74, 40,979.03 and 11,512.80

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Solution

The fourth proportional to 27,308.74, 40,979.03 and 11,512.80 is: 17,275.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,308.74 : 40,979.03 = 11,512.80 : x
  2. Step 2: Convert to fraction form
    27,308.74/40,979.03 = 11,512.80/x
  3. Step 3: Cross multiply
    27,308.74x = 40,979.03 × 11,512.80
  4. Step 4: Simplify right side
    27,308.74x = 471,783,376.58
  5. Step 5: Solve for x
    x = 471,783,376.58/27,308.74
  6. Step 6: Final answer
    x = 17,275.91

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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.