Home / 5,121.43-7,682.30-2,782.56

Finding the Fourth Proportional to 5,121.43, 7,682.30 and 2,782.56

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Solution

The fourth proportional to 5,121.43, 7,682.30 and 2,782.56 is: 4,173.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,121.43 : 7,682.30 = 2,782.56 : x
  2. Step 2: Convert to fraction form
    5,121.43/7,682.30 = 2,782.56/x
  3. Step 3: Cross multiply
    5,121.43x = 7,682.30 × 2,782.56
  4. Step 4: Simplify right side
    5,121.43x = 21,376,427.57
  5. Step 5: Solve for x
    x = 21,376,427.57/5,121.43
  6. Step 6: Final answer
    x = 4,173.92

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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.