Home / 20,125.20-30,191.40-8,439.60

Finding the Fourth Proportional to 20,125.20, 30,191.40 and 8,439.60

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Solution

The fourth proportional to 20,125.20, 30,191.40 and 8,439.60 is: 12,660.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,125.20 : 30,191.40 = 8,439.60 : x
  2. Step 2: Convert to fraction form
    20,125.20/30,191.40 = 8,439.60/x
  3. Step 3: Cross multiply
    20,125.20x = 30,191.40 × 8,439.60
  4. Step 4: Simplify right side
    20,125.20x = 254,803,339.44
  5. Step 5: Solve for x
    x = 254,803,339.44/20,125.20
  6. Step 6: Final answer
    x = 12,660.91

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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.