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Finding the Fourth Proportional to 26,914.80, 40,379.40 and 19,138.80

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Solution

The fourth proportional to 26,914.80, 40,379.40 and 19,138.80 is: 28,713.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,914.80 : 40,379.40 = 19,138.80 : x
  2. Step 2: Convert to fraction form
    26,914.80/40,379.40 = 19,138.80/x
  3. Step 3: Cross multiply
    26,914.80x = 40,379.40 × 19,138.80
  4. Step 4: Simplify right side
    26,914.80x = 772,813,260.72
  5. Step 5: Solve for x
    x = 772,813,260.72/26,914.80
  6. Step 6: Final answer
    x = 28,713.32

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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.