Home / 20,268.20-30,426.60-11,390.60

Finding the Fourth Proportional to 20,268.20, 30,426.60 and 11,390.60

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Solution

The fourth proportional to 20,268.20, 30,426.60 and 11,390.60 is: 17,099.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,268.20 : 30,426.60 = 11,390.60 : x
  2. Step 2: Convert to fraction form
    20,268.20/30,426.60 = 11,390.60/x
  3. Step 3: Cross multiply
    20,268.20x = 30,426.60 × 11,390.60
  4. Step 4: Simplify right side
    20,268.20x = 346,577,229.96
  5. Step 5: Solve for x
    x = 346,577,229.96/20,268.20
  6. Step 6: Final answer
    x = 17,099.56

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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.