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Finding the Fourth Proportional to 19,661.62, 27,132.87 and 13,696.60

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Solution

The fourth proportional to 19,661.62, 27,132.87 and 13,696.60 is: 18,901.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,661.62 : 27,132.87 = 13,696.60 : x
  2. Step 2: Convert to fraction form
    19,661.62/27,132.87 = 13,696.60/x
  3. Step 3: Cross multiply
    19,661.62x = 27,132.87 × 13,696.60
  4. Step 4: Simplify right side
    19,661.62x = 371,628,067.24
  5. Step 5: Solve for x
    x = 371,628,067.24/19,661.62
  6. Step 6: Final answer
    x = 18,901.19

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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.