Home / 20,122.40-30,194.40-8,436.80

Finding the Fourth Proportional to 20,122.40, 30,194.40 and 8,436.80

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Solution

The fourth proportional to 20,122.40, 30,194.40 and 8,436.80 is: 12,659.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,122.40 : 30,194.40 = 8,436.80 : x
  2. Step 2: Convert to fraction form
    20,122.40/30,194.40 = 8,436.80/x
  3. Step 3: Cross multiply
    20,122.40x = 30,194.40 × 8,436.80
  4. Step 4: Simplify right side
    20,122.40x = 254,744,113.92
  5. Step 5: Solve for x
    x = 254,744,113.92/20,122.40
  6. Step 6: Final answer
    x = 12,659.73

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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.