Home / 5,285.39-7,923.20-2,687.72

Finding the Fourth Proportional to 5,285.39, 7,923.20 and 2,687.72

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Solution

The fourth proportional to 5,285.39, 7,923.20 and 2,687.72 is: 4,029.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,285.39 : 7,923.20 = 2,687.72 : x
  2. Step 2: Convert to fraction form
    5,285.39/7,923.20 = 2,687.72/x
  3. Step 3: Cross multiply
    5,285.39x = 7,923.20 × 2,687.72
  4. Step 4: Simplify right side
    5,285.39x = 21,295,290.05
  5. Step 5: Solve for x
    x = 21,295,290.05/5,285.39
  6. Step 6: Final answer
    x = 4,029.09

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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.