Home / 20,163.90-30,213.45-13,230.30

Finding the Fourth Proportional to 20,163.90, 30,213.45 and 13,230.30

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Solution

The fourth proportional to 20,163.90, 30,213.45 and 13,230.30 is: 19,824.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,163.90 : 30,213.45 = 13,230.30 : x
  2. Step 2: Convert to fraction form
    20,163.90/30,213.45 = 13,230.30/x
  3. Step 3: Cross multiply
    20,163.90x = 30,213.45 × 13,230.30
  4. Step 4: Simplify right side
    20,163.90x = 399,733,007.54
  5. Step 5: Solve for x
    x = 399,733,007.54/20,163.90
  6. Step 6: Final answer
    x = 19,824.19

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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.