Home / 20,143.22-30,201.86-13,209.62

Finding the Fourth Proportional to 20,143.22, 30,201.86 and 13,209.62

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Solution

The fourth proportional to 20,143.22, 30,201.86 and 13,209.62 is: 19,805.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,143.22 : 30,201.86 = 13,209.62 : x
  2. Step 2: Convert to fraction form
    20,143.22/30,201.86 = 13,209.62/x
  3. Step 3: Cross multiply
    20,143.22x = 30,201.86 × 13,209.62
  4. Step 4: Simplify right side
    20,143.22x = 398,954,975.91
  5. Step 5: Solve for x
    x = 398,954,975.91/20,143.22
  6. Step 6: Final answer
    x = 19,805.92

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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.