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Finding the Fourth Proportional to 40,403.78, 60,608.94 and 10,821.38

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Solution

The fourth proportional to 40,403.78, 60,608.94 and 10,821.38 is: 16,232.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,403.78 : 60,608.94 = 10,821.38 : x
  2. Step 2: Convert to fraction form
    40,403.78/60,608.94 = 10,821.38/x
  3. Step 3: Cross multiply
    40,403.78x = 60,608.94 × 10,821.38
  4. Step 4: Simplify right side
    40,403.78x = 655,872,371.14
  5. Step 5: Solve for x
    x = 655,872,371.14/40,403.78
  6. Step 6: Final answer
    x = 16,232.95

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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.