Home / 20,571.04-30,861.44-6,720

Finding the Fourth Proportional to 20,571.04, 30,861.44 and 6,720

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Solution

The fourth proportional to 20,571.04, 30,861.44 and 6,720 is: 10,081.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,571.04 : 30,861.44 = 6,720 : x
  2. Step 2: Convert to fraction form
    20,571.04/30,861.44 = 6,720/x
  3. Step 3: Cross multiply
    20,571.04x = 30,861.44 × 6,720
  4. Step 4: Simplify right side
    20,571.04x = 207,388,876.80
  5. Step 5: Solve for x
    x = 207,388,876.80/20,571.04
  6. Step 6: Final answer
    x = 10,081.59

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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.