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Finding the Fourth Proportional to 18,696.93, 25,796.22 and 11,139.48

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Solution

The fourth proportional to 18,696.93, 25,796.22 and 11,139.48 is: 15,369.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,696.93 : 25,796.22 = 11,139.48 : x
  2. Step 2: Convert to fraction form
    18,696.93/25,796.22 = 11,139.48/x
  3. Step 3: Cross multiply
    18,696.93x = 25,796.22 × 11,139.48
  4. Step 4: Simplify right side
    18,696.93x = 287,356,476.77
  5. Step 5: Solve for x
    x = 287,356,476.77/18,696.93
  6. Step 6: Final answer
    x = 15,369.18

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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.