Home / 20,121.92-30,190.88-9,025.60

Finding the Fourth Proportional to 20,121.92, 30,190.88 and 9,025.60

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Solution

The fourth proportional to 20,121.92, 30,190.88 and 9,025.60 is: 13,541.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.92 : 30,190.88 = 9,025.60 : x
  2. Step 2: Convert to fraction form
    20,121.92/30,190.88 = 9,025.60/x
  3. Step 3: Cross multiply
    20,121.92x = 30,190.88 × 9,025.60
  4. Step 4: Simplify right side
    20,121.92x = 272,490,806.53
  5. Step 5: Solve for x
    x = 272,490,806.53/20,121.92
  6. Step 6: Final answer
    x = 13,541.99

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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.