Home / 20,142.36-30,212.94-11,815.98

Finding the Fourth Proportional to 20,142.36, 30,212.94 and 11,815.98

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Solution

The fourth proportional to 20,142.36, 30,212.94 and 11,815.98 is: 17,723.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.36 : 30,212.94 = 11,815.98 : x
  2. Step 2: Convert to fraction form
    20,142.36/30,212.94 = 11,815.98/x
  3. Step 3: Cross multiply
    20,142.36x = 30,212.94 × 11,815.98
  4. Step 4: Simplify right side
    20,142.36x = 356,995,494.78
  5. Step 5: Solve for x
    x = 356,995,494.78/20,142.36
  6. Step 6: Final answer
    x = 17,723.62

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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.