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Finding the Fourth Proportional to 18,611.78, 27,922.22 and 9,256.21

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Solution

The fourth proportional to 18,611.78, 27,922.22 and 9,256.21 is: 13,886.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,611.78 : 27,922.22 = 9,256.21 : x
  2. Step 2: Convert to fraction form
    18,611.78/27,922.22 = 9,256.21/x
  3. Step 3: Cross multiply
    18,611.78x = 27,922.22 × 9,256.21
  4. Step 4: Simplify right side
    18,611.78x = 258,453,850.61
  5. Step 5: Solve for x
    x = 258,453,850.61/18,611.78
  6. Step 6: Final answer
    x = 13,886.58

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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.