Home / 2,640.05-3,956.43-2,561.21

Finding the Fourth Proportional to 2,640.05, 3,956.43 and 2,561.21

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Solution

The fourth proportional to 2,640.05, 3,956.43 and 2,561.21 is: 3,838.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,640.05 : 3,956.43 = 2,561.21 : x
  2. Step 2: Convert to fraction form
    2,640.05/3,956.43 = 2,561.21/x
  3. Step 3: Cross multiply
    2,640.05x = 3,956.43 × 2,561.21
  4. Step 4: Simplify right side
    2,640.05x = 10,133,248.08
  5. Step 5: Solve for x
    x = 10,133,248.08/2,640.05
  6. Step 6: Final answer
    x = 3,838.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.