Home / 3,147.42-4,342.68-1,821

Finding the Fourth Proportional to 3,147.42, 4,342.68 and 1,821

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Solution

The fourth proportional to 3,147.42, 4,342.68 and 1,821 is: 2,512.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,147.42 : 4,342.68 = 1,821 : x
  2. Step 2: Convert to fraction form
    3,147.42/4,342.68 = 1,821/x
  3. Step 3: Cross multiply
    3,147.42x = 4,342.68 × 1,821
  4. Step 4: Simplify right side
    3,147.42x = 7,908,020.28
  5. Step 5: Solve for x
    x = 7,908,020.28/3,147.42
  6. Step 6: Final answer
    x = 2,512.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.