Home / 20,601.87-30,915.50-8,119.73

Finding the Fourth Proportional to 20,601.87, 30,915.50 and 8,119.73

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Solution

The fourth proportional to 20,601.87, 30,915.50 and 8,119.73 is: 12,184.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,601.87 : 30,915.50 = 8,119.73 : x
  2. Step 2: Convert to fraction form
    20,601.87/30,915.50 = 8,119.73/x
  3. Step 3: Cross multiply
    20,601.87x = 30,915.50 × 8,119.73
  4. Step 4: Simplify right side
    20,601.87x = 251,025,317.64
  5. Step 5: Solve for x
    x = 251,025,317.64/20,601.87
  6. Step 6: Final answer
    x = 12,184.59

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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.