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Finding the Fourth Proportional to 17,940.40, 26,910.60 and 11,379.40

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Solution

The fourth proportional to 17,940.40, 26,910.60 and 11,379.40 is: 17,069.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,940.40 : 26,910.60 = 11,379.40 : x
  2. Step 2: Convert to fraction form
    17,940.40/26,910.60 = 11,379.40/x
  3. Step 3: Cross multiply
    17,940.40x = 26,910.60 × 11,379.40
  4. Step 4: Simplify right side
    17,940.40x = 306,226,481.64
  5. Step 5: Solve for x
    x = 306,226,481.64/17,940.40
  6. Step 6: Final answer
    x = 17,069.10

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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.