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Finding the Fourth Proportional to 3,643.99, 5,028.89 and 2,151.97

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Solution

The fourth proportional to 3,643.99, 5,028.89 and 2,151.97 is: 2,969.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,643.99 : 5,028.89 = 2,151.97 : x
  2. Step 2: Convert to fraction form
    3,643.99/5,028.89 = 2,151.97/x
  3. Step 3: Cross multiply
    3,643.99x = 5,028.89 × 2,151.97
  4. Step 4: Simplify right side
    3,643.99x = 10,821,997.08
  5. Step 5: Solve for x
    x = 10,821,997.08/3,643.99
  6. Step 6: Final answer
    x = 2,969.82

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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.