Home / 20,758.18-31,119.81-9,659.22

Finding the Fourth Proportional to 20,758.18, 31,119.81 and 9,659.22

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Solution

The fourth proportional to 20,758.18, 31,119.81 and 9,659.22 is: 14,480.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,758.18 : 31,119.81 = 9,659.22 : x
  2. Step 2: Convert to fraction form
    20,758.18/31,119.81 = 9,659.22/x
  3. Step 3: Cross multiply
    20,758.18x = 31,119.81 × 9,659.22
  4. Step 4: Simplify right side
    20,758.18x = 300,593,091.15
  5. Step 5: Solve for x
    x = 300,593,091.15/20,758.18
  6. Step 6: Final answer
    x = 14,480.71

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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.