Home / 20,212.75-30,322.52-9,119.20

Finding the Fourth Proportional to 20,212.75, 30,322.52 and 9,119.20

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Solution

The fourth proportional to 20,212.75, 30,322.52 and 9,119.20 is: 13,680.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,212.75 : 30,322.52 = 9,119.20 : x
  2. Step 2: Convert to fraction form
    20,212.75/30,322.52 = 9,119.20/x
  3. Step 3: Cross multiply
    20,212.75x = 30,322.52 × 9,119.20
  4. Step 4: Simplify right side
    20,212.75x = 276,517,124.38
  5. Step 5: Solve for x
    x = 276,517,124.38/20,212.75
  6. Step 6: Final answer
    x = 13,680.33

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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.