Home / 20,121.60-30,196.80-8,443.20

Finding the Fourth Proportional to 20,121.60, 30,196.80 and 8,443.20

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Solution

The fourth proportional to 20,121.60, 30,196.80 and 8,443.20 is: 12,670.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.60 : 30,196.80 = 8,443.20 : x
  2. Step 2: Convert to fraction form
    20,121.60/30,196.80 = 8,443.20/x
  3. Step 3: Cross multiply
    20,121.60x = 30,196.80 × 8,443.20
  4. Step 4: Simplify right side
    20,121.60x = 254,957,621.76
  5. Step 5: Solve for x
    x = 254,957,621.76/20,121.60
  6. Step 6: Final answer
    x = 12,670.84

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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.