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Finding the Fourth Proportional to 18,796.31, 25,879.73 and 15,958.07

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Solution

The fourth proportional to 18,796.31, 25,879.73 and 15,958.07 is: 21,971.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,796.31 : 25,879.73 = 15,958.07 : x
  2. Step 2: Convert to fraction form
    18,796.31/25,879.73 = 15,958.07/x
  3. Step 3: Cross multiply
    18,796.31x = 25,879.73 × 15,958.07
  4. Step 4: Simplify right side
    18,796.31x = 412,990,542.92
  5. Step 5: Solve for x
    x = 412,990,542.92/18,796.31
  6. Step 6: Final answer
    x = 21,971.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.