Home / 20,143.82-30,212.61-10,290.38

Finding the Fourth Proportional to 20,143.82, 30,212.61 and 10,290.38

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Solution

The fourth proportional to 20,143.82, 30,212.61 and 10,290.38 is: 15,433.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.82 : 30,212.61 = 10,290.38 : x
  2. Step 2: Convert to fraction form
    20,143.82/30,212.61 = 10,290.38/x
  3. Step 3: Cross multiply
    20,143.82x = 30,212.61 × 10,290.38
  4. Step 4: Simplify right side
    20,143.82x = 310,899,237.69
  5. Step 5: Solve for x
    x = 310,899,237.69/20,143.82
  6. Step 6: Final answer
    x = 15,433.98

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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.