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Finding the Fourth Proportional to 18,009.92, 26,990.48 and 8,136.88

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Solution

The fourth proportional to 18,009.92, 26,990.48 and 8,136.88 is: 12,194.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,009.92 : 26,990.48 = 8,136.88 : x
  2. Step 2: Convert to fraction form
    18,009.92/26,990.48 = 8,136.88/x
  3. Step 3: Cross multiply
    18,009.92x = 26,990.48 × 8,136.88
  4. Step 4: Simplify right side
    18,009.92x = 219,618,296.90
  5. Step 5: Solve for x
    x = 219,618,296.90/18,009.92
  6. Step 6: Final answer
    x = 12,194.30

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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.