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Finding the Fourth Proportional to 20,063.57, 30,078.41 and 12,651.71

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Solution

The fourth proportional to 20,063.57, 30,078.41 and 12,651.71 is: 18,966.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,063.57 : 30,078.41 = 12,651.71 : x
  2. Step 2: Convert to fraction form
    20,063.57/30,078.41 = 12,651.71/x
  3. Step 3: Cross multiply
    20,063.57x = 30,078.41 × 12,651.71
  4. Step 4: Simplify right side
    20,063.57x = 380,543,106.93
  5. Step 5: Solve for x
    x = 380,543,106.93/20,063.57
  6. Step 6: Final answer
    x = 18,966.87

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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.