Home / 3,891.24-5,369.63-2,122.80

Finding the Fourth Proportional to 3,891.24, 5,369.63 and 2,122.80

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Solution

The fourth proportional to 3,891.24, 5,369.63 and 2,122.80 is: 2,929.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.24 : 5,369.63 = 2,122.80 : x
  2. Step 2: Convert to fraction form
    3,891.24/5,369.63 = 2,122.80/x
  3. Step 3: Cross multiply
    3,891.24x = 5,369.63 × 2,122.80
  4. Step 4: Simplify right side
    3,891.24x = 11,398,639.95
  5. Step 5: Solve for x
    x = 11,398,639.95/3,891.24
  6. Step 6: Final answer
    x = 2,929.31

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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.