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Finding the Fourth Proportional to 20,050.68, 30,078.81 and 8,361.21

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Solution

The fourth proportional to 20,050.68, 30,078.81 and 8,361.21 is: 12,542.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,050.68 : 30,078.81 = 8,361.21 : x
  2. Step 2: Convert to fraction form
    20,050.68/30,078.81 = 8,361.21/x
  3. Step 3: Cross multiply
    20,050.68x = 30,078.81 × 8,361.21
  4. Step 4: Simplify right side
    20,050.68x = 251,495,246.96
  5. Step 5: Solve for x
    x = 251,495,246.96/20,050.68
  6. Step 6: Final answer
    x = 12,542.98

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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.