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Finding the Fourth Proportional to 20,562.40, 30,843.60 and 11,231.20

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Solution

The fourth proportional to 20,562.40, 30,843.60 and 11,231.20 is: 16,846.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,562.40 : 30,843.60 = 11,231.20 : x
  2. Step 2: Convert to fraction form
    20,562.40/30,843.60 = 11,231.20/x
  3. Step 3: Cross multiply
    20,562.40x = 30,843.60 × 11,231.20
  4. Step 4: Simplify right side
    20,562.40x = 346,410,640.32
  5. Step 5: Solve for x
    x = 346,410,640.32/20,562.40
  6. Step 6: Final answer
    x = 16,846.80

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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.