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Finding the Fourth Proportional to 17,879.68, 26,828.62 and 7,357.78

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Solution

The fourth proportional to 17,879.68, 26,828.62 and 7,357.78 is: 11,040.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,879.68 : 26,828.62 = 7,357.78 : x
  2. Step 2: Convert to fraction form
    17,879.68/26,828.62 = 7,357.78/x
  3. Step 3: Cross multiply
    17,879.68x = 26,828.62 × 7,357.78
  4. Step 4: Simplify right side
    17,879.68x = 197,399,083.66
  5. Step 5: Solve for x
    x = 197,399,083.66/17,879.68
  6. Step 6: Final answer
    x = 11,040.41

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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.