Home / 13,609.13-20,414.98-5,289.78

Finding the Fourth Proportional to 13,609.13, 20,414.98 and 5,289.78

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Solution

The fourth proportional to 13,609.13, 20,414.98 and 5,289.78 is: 7,935.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,609.13 : 20,414.98 = 5,289.78 : x
  2. Step 2: Convert to fraction form
    13,609.13/20,414.98 = 5,289.78/x
  3. Step 3: Cross multiply
    13,609.13x = 20,414.98 × 5,289.78
  4. Step 4: Simplify right side
    13,609.13x = 107,990,739.68
  5. Step 5: Solve for x
    x = 107,990,739.68/13,609.13
  6. Step 6: Final answer
    x = 7,935.17

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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.