Home / 25,979.19-38,996.34-21,107.66

Finding the Fourth Proportional to 25,979.19, 38,996.34 and 21,107.66

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Solution

The fourth proportional to 25,979.19, 38,996.34 and 21,107.66 is: 31,683.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,979.19 : 38,996.34 = 21,107.66 : x
  2. Step 2: Convert to fraction form
    25,979.19/38,996.34 = 21,107.66/x
  3. Step 3: Cross multiply
    25,979.19x = 38,996.34 × 21,107.66
  4. Step 4: Simplify right side
    25,979.19x = 823,121,290.98
  5. Step 5: Solve for x
    x = 823,121,290.98/25,979.19
  6. Step 6: Final answer
    x = 31,683.87

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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.