Home / 5,215.69-7,197.73-2,857.78

Finding the Fourth Proportional to 5,215.69, 7,197.73 and 2,857.78

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Solution

The fourth proportional to 5,215.69, 7,197.73 and 2,857.78 is: 3,943.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.69 : 7,197.73 = 2,857.78 : x
  2. Step 2: Convert to fraction form
    5,215.69/7,197.73 = 2,857.78/x
  3. Step 3: Cross multiply
    5,215.69x = 7,197.73 × 2,857.78
  4. Step 4: Simplify right side
    5,215.69x = 20,569,530.69
  5. Step 5: Solve for x
    x = 20,569,530.69/5,215.69
  6. Step 6: Final answer
    x = 3,943.78

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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.