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Finding the Fourth Proportional to 26,838.39, 40,076.86 and 21,917.79

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Solution

The fourth proportional to 26,838.39, 40,076.86 and 21,917.79 is: 32,729.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,838.39 : 40,076.86 = 21,917.79 : x
  2. Step 2: Convert to fraction form
    26,838.39/40,076.86 = 21,917.79/x
  3. Step 3: Cross multiply
    26,838.39x = 40,076.86 × 21,917.79
  4. Step 4: Simplify right side
    26,838.39x = 878,396,146.54
  5. Step 5: Solve for x
    x = 878,396,146.54/26,838.39
  6. Step 6: Final answer
    x = 32,729.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.