Home / 20,621.62-30,911.30-8,136.60

Finding the Fourth Proportional to 20,621.62, 30,911.30 and 8,136.60

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Solution

The fourth proportional to 20,621.62, 30,911.30 and 8,136.60 is: 12,196.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,621.62 : 30,911.30 = 8,136.60 : x
  2. Step 2: Convert to fraction form
    20,621.62/30,911.30 = 8,136.60/x
  3. Step 3: Cross multiply
    20,621.62x = 30,911.30 × 8,136.60
  4. Step 4: Simplify right side
    20,621.62x = 251,512,883.58
  5. Step 5: Solve for x
    x = 251,512,883.58/20,621.62
  6. Step 6: Final answer
    x = 12,196.56

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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.