Home / 5,215.56-7,197.39-2,857.72

Finding the Fourth Proportional to 5,215.56, 7,197.39 and 2,857.72

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Solution

The fourth proportional to 5,215.56, 7,197.39 and 2,857.72 is: 3,943.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.56 : 7,197.39 = 2,857.72 : x
  2. Step 2: Convert to fraction form
    5,215.56/7,197.39 = 2,857.72/x
  3. Step 3: Cross multiply
    5,215.56x = 7,197.39 × 2,857.72
  4. Step 4: Simplify right side
    5,215.56x = 20,568,107.36
  5. Step 5: Solve for x
    x = 20,568,107.36/5,215.56
  6. Step 6: Final answer
    x = 3,943.60

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1.5x scale

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.