Home / 20,418.62-30,640.98-13,028.36

Finding the Fourth Proportional to 20,418.62, 30,640.98 and 13,028.36

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Solution

The fourth proportional to 20,418.62, 30,640.98 and 13,028.36 is: 19,550.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,418.62 : 30,640.98 = 13,028.36 : x
  2. Step 2: Convert to fraction form
    20,418.62/30,640.98 = 13,028.36/x
  3. Step 3: Cross multiply
    20,418.62x = 30,640.98 × 13,028.36
  4. Step 4: Simplify right side
    20,418.62x = 399,201,718.19
  5. Step 5: Solve for x
    x = 399,201,718.19/20,418.62
  6. Step 6: Final answer
    x = 19,550.87

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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.