Home / 5,351.20-8,021.40-2,431.60

Finding the Fourth Proportional to 5,351.20, 8,021.40 and 2,431.60

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Solution

The fourth proportional to 5,351.20, 8,021.40 and 2,431.60 is: 3,644.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,351.20 : 8,021.40 = 2,431.60 : x
  2. Step 2: Convert to fraction form
    5,351.20/8,021.40 = 2,431.60/x
  3. Step 3: Cross multiply
    5,351.20x = 8,021.40 × 2,431.60
  4. Step 4: Simplify right side
    5,351.20x = 19,504,836.24
  5. Step 5: Solve for x
    x = 19,504,836.24/5,351.20
  6. Step 6: Final answer
    x = 3,644.95

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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.