Home / 20,280.15-30,422.12-5,489.19

Finding the Fourth Proportional to 20,280.15, 30,422.12 and 5,489.19

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Solution

The fourth proportional to 20,280.15, 30,422.12 and 5,489.19 is: 8,234.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,280.15 : 30,422.12 = 5,489.19 : x
  2. Step 2: Convert to fraction form
    20,280.15/30,422.12 = 5,489.19/x
  3. Step 3: Cross multiply
    20,280.15x = 30,422.12 × 5,489.19
  4. Step 4: Simplify right side
    20,280.15x = 166,992,769.44
  5. Step 5: Solve for x
    x = 166,992,769.44/20,280.15
  6. Step 6: Final answer
    x = 8,234.30

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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.