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Finding the Fourth Proportional to 18,513.26, 27,734.91 and 9,142.34

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Solution

The fourth proportional to 18,513.26, 27,734.91 and 9,142.34 is: 13,696.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,513.26 : 27,734.91 = 9,142.34 : x
  2. Step 2: Convert to fraction form
    18,513.26/27,734.91 = 9,142.34/x
  3. Step 3: Cross multiply
    18,513.26x = 27,734.91 × 9,142.34
  4. Step 4: Simplify right side
    18,513.26x = 253,561,804.13
  5. Step 5: Solve for x
    x = 253,561,804.13/18,513.26
  6. Step 6: Final answer
    x = 13,696.23

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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.