Home / 20,800.20-31,229.10-16,422.60

Finding the Fourth Proportional to 20,800.20, 31,229.10 and 16,422.60

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Solution

The fourth proportional to 20,800.20, 31,229.10 and 16,422.60 is: 24,656.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.20 : 31,229.10 = 16,422.60 : x
  2. Step 2: Convert to fraction form
    20,800.20/31,229.10 = 16,422.60/x
  3. Step 3: Cross multiply
    20,800.20x = 31,229.10 × 16,422.60
  4. Step 4: Simplify right side
    20,800.20x = 512,863,017.66
  5. Step 5: Solve for x
    x = 512,863,017.66/20,800.20
  6. Step 6: Final answer
    x = 24,656.64

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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.