Home / 13,418.80-20,131.40-5,623.28

Finding the Fourth Proportional to 13,418.80, 20,131.40 and 5,623.28

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Solution

The fourth proportional to 13,418.80, 20,131.40 and 5,623.28 is: 8,436.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,418.80 : 20,131.40 = 5,623.28 : x
  2. Step 2: Convert to fraction form
    13,418.80/20,131.40 = 5,623.28/x
  3. Step 3: Cross multiply
    13,418.80x = 20,131.40 × 5,623.28
  4. Step 4: Simplify right side
    13,418.80x = 113,204,498.99
  5. Step 5: Solve for x
    x = 113,204,498.99/13,418.80
  6. Step 6: Final answer
    x = 8,436.26

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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.