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Finding the Fourth Proportional to 35,940.78, 53,890.20 and 13,755.66

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Solution

The fourth proportional to 35,940.78, 53,890.20 and 13,755.66 is: 20,625.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,940.78 : 53,890.20 = 13,755.66 : x
  2. Step 2: Convert to fraction form
    35,940.78/53,890.20 = 13,755.66/x
  3. Step 3: Cross multiply
    35,940.78x = 53,890.20 × 13,755.66
  4. Step 4: Simplify right side
    35,940.78x = 741,295,268.53
  5. Step 5: Solve for x
    x = 741,295,268.53/35,940.78
  6. Step 6: Final answer
    x = 20,625.46

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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.