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Finding the Fourth Proportional to 6,661.20, 9,974.20 and 5,338.80

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Solution

The fourth proportional to 6,661.20, 9,974.20 and 5,338.80 is: 7,994.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,661.20 : 9,974.20 = 5,338.80 : x
  2. Step 2: Convert to fraction form
    6,661.20/9,974.20 = 5,338.80/x
  3. Step 3: Cross multiply
    6,661.20x = 9,974.20 × 5,338.80
  4. Step 4: Simplify right side
    6,661.20x = 53,250,258.96
  5. Step 5: Solve for x
    x = 53,250,258.96/6,661.20
  6. Step 6: Final answer
    x = 7,994.09

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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.