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Finding the Fourth Proportional to 18,671.71, 25,791.60 and 13,836.28

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Solution

The fourth proportional to 18,671.71, 25,791.60 and 13,836.28 is: 19,112.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,671.71 : 25,791.60 = 13,836.28 : x
  2. Step 2: Convert to fraction form
    18,671.71/25,791.60 = 13,836.28/x
  3. Step 3: Cross multiply
    18,671.71x = 25,791.60 × 13,836.28
  4. Step 4: Simplify right side
    18,671.71x = 356,859,799.25
  5. Step 5: Solve for x
    x = 356,859,799.25/18,671.71
  6. Step 6: Final answer
    x = 19,112.33

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1.5x scale

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.