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Finding the Fourth Proportional to 20,145.57, 30,187.57 and 8,452.41

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Solution

The fourth proportional to 20,145.57, 30,187.57 and 8,452.41 is: 12,665.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,145.57 : 30,187.57 = 8,452.41 : x
  2. Step 2: Convert to fraction form
    20,145.57/30,187.57 = 8,452.41/x
  3. Step 3: Cross multiply
    20,145.57x = 30,187.57 × 8,452.41
  4. Step 4: Simplify right side
    20,145.57x = 255,157,718.54
  5. Step 5: Solve for x
    x = 255,157,718.54/20,145.57
  6. Step 6: Final answer
    x = 12,665.70

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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.