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Finding the Fourth Proportional to 20,140.70, 30,174.60 and 16,422.80

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Solution

The fourth proportional to 20,140.70, 30,174.60 and 16,422.80 is: 24,604.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,140.70 : 30,174.60 = 16,422.80 : x
  2. Step 2: Convert to fraction form
    20,140.70/30,174.60 = 16,422.80/x
  3. Step 3: Cross multiply
    20,140.70x = 30,174.60 × 16,422.80
  4. Step 4: Simplify right side
    20,140.70x = 495,551,420.88
  5. Step 5: Solve for x
    x = 495,551,420.88/20,140.70
  6. Step 6: Final answer
    x = 24,604.48

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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.