Home / 5,215.05-7,196.75-2,857.17

Finding the Fourth Proportional to 5,215.05, 7,196.75 and 2,857.17

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Solution

The fourth proportional to 5,215.05, 7,196.75 and 2,857.17 is: 3,942.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.05 : 7,196.75 = 2,857.17 : x
  2. Step 2: Convert to fraction form
    5,215.05/7,196.75 = 2,857.17/x
  3. Step 3: Cross multiply
    5,215.05x = 7,196.75 × 2,857.17
  4. Step 4: Simplify right side
    5,215.05x = 20,562,361.61
  5. Step 5: Solve for x
    x = 20,562,361.61/5,215.05
  6. Step 6: Final answer
    x = 3,942.89

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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.