Home / 20,839.20-31,210.20-14,229.60

Finding the Fourth Proportional to 20,839.20, 31,210.20 and 14,229.60

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Solution

The fourth proportional to 20,839.20, 31,210.20 and 14,229.60 is: 21,311.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839.20 : 31,210.20 = 14,229.60 : x
  2. Step 2: Convert to fraction form
    20,839.20/31,210.20 = 14,229.60/x
  3. Step 3: Cross multiply
    20,839.20x = 31,210.20 × 14,229.60
  4. Step 4: Simplify right side
    20,839.20x = 444,108,661.92
  5. Step 5: Solve for x
    x = 444,108,661.92/20,839.20
  6. Step 6: Final answer
    x = 21,311.21

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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.