Home / 20,639.68-30,961.76-6,788.64

Finding the Fourth Proportional to 20,639.68, 30,961.76 and 6,788.64

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Solution

The fourth proportional to 20,639.68, 30,961.76 and 6,788.64 is: 10,183.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.68 : 30,961.76 = 6,788.64 : x
  2. Step 2: Convert to fraction form
    20,639.68/30,961.76 = 6,788.64/x
  3. Step 3: Cross multiply
    20,639.68x = 30,961.76 × 6,788.64
  4. Step 4: Simplify right side
    20,639.68x = 210,188,242.41
  5. Step 5: Solve for x
    x = 210,188,242.41/20,639.68
  6. Step 6: Final answer
    x = 10,183.70

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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.