Home / 5,215.29-7,197.19-2,857.28

Finding the Fourth Proportional to 5,215.29, 7,197.19 and 2,857.28

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Solution

The fourth proportional to 5,215.29, 7,197.19 and 2,857.28 is: 3,943.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.29 : 7,197.19 = 2,857.28 : x
  2. Step 2: Convert to fraction form
    5,215.29/7,197.19 = 2,857.28/x
  3. Step 3: Cross multiply
    5,215.29x = 7,197.19 × 2,857.28
  4. Step 4: Simplify right side
    5,215.29x = 20,564,387.04
  5. Step 5: Solve for x
    x = 20,564,387.04/5,215.29
  6. Step 6: Final answer
    x = 3,943.10

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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.