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Finding the Fourth Proportional to 19,662.54, 27,127.62 and 11,163.78

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Solution

The fourth proportional to 19,662.54, 27,127.62 and 11,163.78 is: 15,402.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,662.54 : 27,127.62 = 11,163.78 : x
  2. Step 2: Convert to fraction form
    19,662.54/27,127.62 = 11,163.78/x
  3. Step 3: Cross multiply
    19,662.54x = 27,127.62 × 11,163.78
  4. Step 4: Simplify right side
    19,662.54x = 302,846,781.60
  5. Step 5: Solve for x
    x = 302,846,781.60/19,662.54
  6. Step 6: Final answer
    x = 15,402.22

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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.