Home / 20,839.20-31,326.53-16,724.30

Finding the Fourth Proportional to 20,839.20, 31,326.53 and 16,724.30

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Solution

The fourth proportional to 20,839.20, 31,326.53 and 16,724.30 is: 25,140.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839.20 : 31,326.53 = 16,724.30 : x
  2. Step 2: Convert to fraction form
    20,839.20/31,326.53 = 16,724.30/x
  3. Step 3: Cross multiply
    20,839.20x = 31,326.53 × 16,724.30
  4. Step 4: Simplify right side
    20,839.20x = 523,914,170.86
  5. Step 5: Solve for x
    x = 523,914,170.86/20,839.20
  6. Step 6: Final answer
    x = 25,140.80

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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.