Home / 13,418.82-20,129.31-3,558.02

Finding the Fourth Proportional to 13,418.82, 20,129.31 and 3,558.02

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Solution

The fourth proportional to 13,418.82, 20,129.31 and 3,558.02 is: 5,337.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,418.82 : 20,129.31 = 3,558.02 : x
  2. Step 2: Convert to fraction form
    13,418.82/20,129.31 = 3,558.02/x
  3. Step 3: Cross multiply
    13,418.82x = 20,129.31 × 3,558.02
  4. Step 4: Simplify right side
    13,418.82x = 71,620,386.92
  5. Step 5: Solve for x
    x = 71,620,386.92/13,418.82
  6. Step 6: Final answer
    x = 5,337.31

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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.