Home / 5,215.20-7,197.15-2,857.34

Finding the Fourth Proportional to 5,215.20, 7,197.15 and 2,857.34

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Solution

The fourth proportional to 5,215.20, 7,197.15 and 2,857.34 is: 3,943.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.20 : 7,197.15 = 2,857.34 : x
  2. Step 2: Convert to fraction form
    5,215.20/7,197.15 = 2,857.34/x
  3. Step 3: Cross multiply
    5,215.20x = 7,197.15 × 2,857.34
  4. Step 4: Simplify right side
    5,215.20x = 20,564,668.60
  5. Step 5: Solve for x
    x = 20,564,668.60/5,215.20
  6. Step 6: Final answer
    x = 3,943.22

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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.