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Finding the Fourth Proportional to 33,685, 46,485.30 and 18,781

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Solution

The fourth proportional to 33,685, 46,485.30 and 18,781 is: 25,917.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,685 : 46,485.30 = 18,781 : x
  2. Step 2: Convert to fraction form
    33,685/46,485.30 = 18,781/x
  3. Step 3: Cross multiply
    33,685x = 46,485.30 × 18,781
  4. Step 4: Simplify right side
    33,685x = 873,040,419.30
  5. Step 5: Solve for x
    x = 873,040,419.30/33,685
  6. Step 6: Final answer
    x = 25,917.78

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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.