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Finding the Fourth Proportional to 18,411.78, 27,611.28 and 17,230.80

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Solution

The fourth proportional to 18,411.78, 27,611.28 and 17,230.80 is: 25,840.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,411.78 : 27,611.28 = 17,230.80 : x
  2. Step 2: Convert to fraction form
    18,411.78/27,611.28 = 17,230.80/x
  3. Step 3: Cross multiply
    18,411.78x = 27,611.28 × 17,230.80
  4. Step 4: Simplify right side
    18,411.78x = 475,764,443.42
  5. Step 5: Solve for x
    x = 475,764,443.42/18,411.78
  6. Step 6: Final answer
    x = 25,840.22

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1.5x scale

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.