Home / 2,811.41-3,881.32-1,868.49

Finding the Fourth Proportional to 2,811.41, 3,881.32 and 1,868.49

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Solution

The fourth proportional to 2,811.41, 3,881.32 and 1,868.49 is: 2,579.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.41 : 3,881.32 = 1,868.49 : x
  2. Step 2: Convert to fraction form
    2,811.41/3,881.32 = 1,868.49/x
  3. Step 3: Cross multiply
    2,811.41x = 3,881.32 × 1,868.49
  4. Step 4: Simplify right side
    2,811.41x = 7,252,213.85
  5. Step 5: Solve for x
    x = 7,252,213.85/2,811.41
  6. Step 6: Final answer
    x = 2,579.57

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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.