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Finding the Fourth Proportional to 20,617.56, 30,945.78 and 10,763.64

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Solution

The fourth proportional to 20,617.56, 30,945.78 and 10,763.64 is: 16,155.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,617.56 : 30,945.78 = 10,763.64 : x
  2. Step 2: Convert to fraction form
    20,617.56/30,945.78 = 10,763.64/x
  3. Step 3: Cross multiply
    20,617.56x = 30,945.78 × 10,763.64
  4. Step 4: Simplify right side
    20,617.56x = 333,089,235.44
  5. Step 5: Solve for x
    x = 333,089,235.44/20,617.56
  6. Step 6: Final answer
    x = 16,155.61

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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.