Home / 5,215.73-7,197.79-2,857.71

Finding the Fourth Proportional to 5,215.73, 7,197.79 and 2,857.71

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Solution

The fourth proportional to 5,215.73, 7,197.79 and 2,857.71 is: 3,943.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.73 : 7,197.79 = 2,857.71 : x
  2. Step 2: Convert to fraction form
    5,215.73/7,197.79 = 2,857.71/x
  3. Step 3: Cross multiply
    5,215.73x = 7,197.79 × 2,857.71
  4. Step 4: Simplify right side
    5,215.73x = 20,569,196.46
  5. Step 5: Solve for x
    x = 20,569,196.46/5,215.73
  6. Step 6: Final answer
    x = 3,943.69

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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.