Home / 5,215.36-7,197.24-2,857.72

Finding the Fourth Proportional to 5,215.36, 7,197.24 and 2,857.72

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Solution

The fourth proportional to 5,215.36, 7,197.24 and 2,857.72 is: 3,943.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.36 : 7,197.24 = 2,857.72 : x
  2. Step 2: Convert to fraction form
    5,215.36/7,197.24 = 2,857.72/x
  3. Step 3: Cross multiply
    5,215.36x = 7,197.24 × 2,857.72
  4. Step 4: Simplify right side
    5,215.36x = 20,567,696.69
  5. Step 5: Solve for x
    x = 20,567,696.69/5,215.36
  6. Step 6: Final answer
    x = 3,943.68

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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.