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Finding the Fourth Proportional to 18,481.64, 27,722.18 and 8,615.30

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Solution

The fourth proportional to 18,481.64, 27,722.18 and 8,615.30 is: 12,922.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,481.64 : 27,722.18 = 8,615.30 : x
  2. Step 2: Convert to fraction form
    18,481.64/27,722.18 = 8,615.30/x
  3. Step 3: Cross multiply
    18,481.64x = 27,722.18 × 8,615.30
  4. Step 4: Simplify right side
    18,481.64x = 238,834,897.35
  5. Step 5: Solve for x
    x = 238,834,897.35/18,481.64
  6. Step 6: Final answer
    x = 12,922.82

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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.