Home / 2,815.43-4,223.37-2,123.42

Finding the Fourth Proportional to 2,815.43, 4,223.37 and 2,123.42

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Solution

The fourth proportional to 2,815.43, 4,223.37 and 2,123.42 is: 3,185.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.43 : 4,223.37 = 2,123.42 : x
  2. Step 2: Convert to fraction form
    2,815.43/4,223.37 = 2,123.42/x
  3. Step 3: Cross multiply
    2,815.43x = 4,223.37 × 2,123.42
  4. Step 4: Simplify right side
    2,815.43x = 8,967,988.33
  5. Step 5: Solve for x
    x = 8,967,988.33/2,815.43
  6. Step 6: Final answer
    x = 3,185.30

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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.