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Finding the Fourth Proportional to 19,696.88, 27,173.06 and 13,321.22

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Solution

The fourth proportional to 19,696.88, 27,173.06 and 13,321.22 is: 18,377.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,696.88 : 27,173.06 = 13,321.22 : x
  2. Step 2: Convert to fraction form
    19,696.88/27,173.06 = 13,321.22/x
  3. Step 3: Cross multiply
    19,696.88x = 27,173.06 × 13,321.22
  4. Step 4: Simplify right side
    19,696.88x = 361,978,310.33
  5. Step 5: Solve for x
    x = 361,978,310.33/19,696.88
  6. Step 6: Final answer
    x = 18,377.44

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1.5x scale

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.