Home / 20,143.70-30,205.17-9,040.87

Finding the Fourth Proportional to 20,143.70, 30,205.17 and 9,040.87

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Solution

The fourth proportional to 20,143.70, 30,205.17 and 9,040.87 is: 13,556.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.70 : 30,205.17 = 9,040.87 : x
  2. Step 2: Convert to fraction form
    20,143.70/30,205.17 = 9,040.87/x
  3. Step 3: Cross multiply
    20,143.70x = 30,205.17 × 9,040.87
  4. Step 4: Simplify right side
    20,143.70x = 273,081,015.30
  5. Step 5: Solve for x
    x = 273,081,015.30/20,143.70
  6. Step 6: Final answer
    x = 13,556.65

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1.5x scale

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.