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Finding the Fourth Proportional to 17,679.70, 26,500.11 and 7,285.78

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Solution

The fourth proportional to 17,679.70, 26,500.11 and 7,285.78 is: 10,920.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,679.70 : 26,500.11 = 7,285.78 : x
  2. Step 2: Convert to fraction form
    17,679.70/26,500.11 = 7,285.78/x
  3. Step 3: Cross multiply
    17,679.70x = 26,500.11 × 7,285.78
  4. Step 4: Simplify right side
    17,679.70x = 193,073,971.44
  5. Step 5: Solve for x
    x = 193,073,971.44/17,679.70
  6. Step 6: Final answer
    x = 10,920.66

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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.