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Finding the Fourth Proportional to 17,918.76, 26,879.41 and 5,439.80

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Solution

The fourth proportional to 17,918.76, 26,879.41 and 5,439.80 is: 8,160.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,918.76 : 26,879.41 = 5,439.80 : x
  2. Step 2: Convert to fraction form
    17,918.76/26,879.41 = 5,439.80/x
  3. Step 3: Cross multiply
    17,918.76x = 26,879.41 × 5,439.80
  4. Step 4: Simplify right side
    17,918.76x = 146,218,614.52
  5. Step 5: Solve for x
    x = 146,218,614.52/17,918.76
  6. Step 6: Final answer
    x = 8,160.09

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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.