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Finding the Fourth Proportional to 17,989.75, 26,984.39 and 8,122.12

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Solution

The fourth proportional to 17,989.75, 26,984.39 and 8,122.12 is: 12,183.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,989.75 : 26,984.39 = 8,122.12 : x
  2. Step 2: Convert to fraction form
    17,989.75/26,984.39 = 8,122.12/x
  3. Step 3: Cross multiply
    17,989.75x = 26,984.39 × 8,122.12
  4. Step 4: Simplify right side
    17,989.75x = 219,170,543.11
  5. Step 5: Solve for x
    x = 219,170,543.11/17,989.75
  6. Step 6: Final answer
    x = 12,183.08

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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.