Home / 20,142.69-30,213.81-12,247.38

Finding the Fourth Proportional to 20,142.69, 30,213.81 and 12,247.38

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Solution

The fourth proportional to 20,142.69, 30,213.81 and 12,247.38 is: 18,370.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.69 : 30,213.81 = 12,247.38 : x
  2. Step 2: Convert to fraction form
    20,142.69/30,213.81 = 12,247.38/x
  3. Step 3: Cross multiply
    20,142.69x = 30,213.81 × 12,247.38
  4. Step 4: Simplify right side
    20,142.69x = 370,040,012.32
  5. Step 5: Solve for x
    x = 370,040,012.32/20,142.69
  6. Step 6: Final answer
    x = 18,370.93

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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.