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Finding the Fourth Proportional to 18,696.78, 28,045.26 and 4,845.78

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Solution

The fourth proportional to 18,696.78, 28,045.26 and 4,845.78 is: 7,268.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,696.78 : 28,045.26 = 4,845.78 : x
  2. Step 2: Convert to fraction form
    18,696.78/28,045.26 = 4,845.78/x
  3. Step 3: Cross multiply
    18,696.78x = 28,045.26 × 4,845.78
  4. Step 4: Simplify right side
    18,696.78x = 135,901,160.00
  5. Step 5: Solve for x
    x = 135,901,160.00/18,696.78
  6. Step 6: Final answer
    x = 7,268.69

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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.