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Finding the Fourth Proportional to 22,175.78, 30,601.80 and 13,218.68

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Solution

The fourth proportional to 22,175.78, 30,601.80 and 13,218.68 is: 18,241.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,175.78 : 30,601.80 = 13,218.68 : x
  2. Step 2: Convert to fraction form
    22,175.78/30,601.80 = 13,218.68/x
  3. Step 3: Cross multiply
    22,175.78x = 30,601.80 × 13,218.68
  4. Step 4: Simplify right side
    22,175.78x = 404,515,401.62
  5. Step 5: Solve for x
    x = 404,515,401.62/22,175.78
  6. Step 6: Final answer
    x = 18,241.32

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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.