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Finding the Fourth Proportional to 20,198.40, 30,286.80 and 7,051.20

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Solution

The fourth proportional to 20,198.40, 30,286.80 and 7,051.20 is: 10,573.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,198.40 : 30,286.80 = 7,051.20 : x
  2. Step 2: Convert to fraction form
    20,198.40/30,286.80 = 7,051.20/x
  3. Step 3: Cross multiply
    20,198.40x = 30,286.80 × 7,051.20
  4. Step 4: Simplify right side
    20,198.40x = 213,558,284.16
  5. Step 5: Solve for x
    x = 213,558,284.16/20,198.40
  6. Step 6: Final answer
    x = 10,573.03

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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.