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Finding the Fourth Proportional to 28,625.92, 42,930.24 and 16,936

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Solution

The fourth proportional to 28,625.92, 42,930.24 and 16,936 is: 25,398.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,625.92 : 42,930.24 = 16,936 : x
  2. Step 2: Convert to fraction form
    28,625.92/42,930.24 = 16,936/x
  3. Step 3: Cross multiply
    28,625.92x = 42,930.24 × 16,936
  4. Step 4: Simplify right side
    28,625.92x = 727,066,544.64
  5. Step 5: Solve for x
    x = 727,066,544.64/28,625.92
  6. Step 6: Final answer
    x = 25,398.89

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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.