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Finding the Fourth Proportional to 39,874.60, 55,027.11 and 21,968.74

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Solution

The fourth proportional to 39,874.60, 55,027.11 and 21,968.74 is: 30,316.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,874.60 : 55,027.11 = 21,968.74 : x
  2. Step 2: Convert to fraction form
    39,874.60/55,027.11 = 21,968.74/x
  3. Step 3: Cross multiply
    39,874.60x = 55,027.11 × 21,968.74
  4. Step 4: Simplify right side
    39,874.60x = 1,208,876,272.54
  5. Step 5: Solve for x
    x = 1,208,876,272.54/39,874.60
  6. Step 6: Final answer
    x = 30,316.95

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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.