Home / 3,991.24-5,510.82-2,874.28

Finding the Fourth Proportional to 3,991.24, 5,510.82 and 2,874.28

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Solution

The fourth proportional to 3,991.24, 5,510.82 and 2,874.28 is: 3,968.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.24 : 5,510.82 = 2,874.28 : x
  2. Step 2: Convert to fraction form
    3,991.24/5,510.82 = 2,874.28/x
  3. Step 3: Cross multiply
    3,991.24x = 5,510.82 × 2,874.28
  4. Step 4: Simplify right side
    3,991.24x = 15,839,639.71
  5. Step 5: Solve for x
    x = 15,839,639.71/3,991.24
  6. Step 6: Final answer
    x = 3,968.60

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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.