Home / 20,136.40-30,180.30-10,270.60

Finding the Fourth Proportional to 20,136.40, 30,180.30 and 10,270.60

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Solution

The fourth proportional to 20,136.40, 30,180.30 and 10,270.60 is: 15,393.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,136.40 : 30,180.30 = 10,270.60 : x
  2. Step 2: Convert to fraction form
    20,136.40/30,180.30 = 10,270.60/x
  3. Step 3: Cross multiply
    20,136.40x = 30,180.30 × 10,270.60
  4. Step 4: Simplify right side
    20,136.40x = 309,969,789.18
  5. Step 5: Solve for x
    x = 309,969,789.18/20,136.40
  6. Step 6: Final answer
    x = 15,393.51

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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.