Home / 13,680.52-20,520.16-3,819.60

Finding the Fourth Proportional to 13,680.52, 20,520.16 and 3,819.60

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Solution

The fourth proportional to 13,680.52, 20,520.16 and 3,819.60 is: 5,729.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,680.52 : 20,520.16 = 3,819.60 : x
  2. Step 2: Convert to fraction form
    13,680.52/20,520.16 = 3,819.60/x
  3. Step 3: Cross multiply
    13,680.52x = 20,520.16 × 3,819.60
  4. Step 4: Simplify right side
    13,680.52x = 78,378,803.14
  5. Step 5: Solve for x
    x = 78,378,803.14/13,680.52
  6. Step 6: Final answer
    x = 5,729.23

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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.