Home / 19,202.20-28,803.30-8,121.40

Finding the Fourth Proportional to 19,202.20, 28,803.30 and 8,121.40

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Solution

The fourth proportional to 19,202.20, 28,803.30 and 8,121.40 is: 12,182.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,202.20 : 28,803.30 = 8,121.40 : x
  2. Step 2: Convert to fraction form
    19,202.20/28,803.30 = 8,121.40/x
  3. Step 3: Cross multiply
    19,202.20x = 28,803.30 × 8,121.40
  4. Step 4: Simplify right side
    19,202.20x = 233,923,120.62
  5. Step 5: Solve for x
    x = 233,923,120.62/19,202.20
  6. Step 6: Final answer
    x = 12,182.10

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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.