Home / 3,911.78-5,863.62-1,313.84

Finding the Fourth Proportional to 3,911.78, 5,863.62 and 1,313.84

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Solution

The fourth proportional to 3,911.78, 5,863.62 and 1,313.84 is: 1,969.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.78 : 5,863.62 = 1,313.84 : x
  2. Step 2: Convert to fraction form
    3,911.78/5,863.62 = 1,313.84/x
  3. Step 3: Cross multiply
    3,911.78x = 5,863.62 × 1,313.84
  4. Step 4: Simplify right side
    3,911.78x = 7,703,858.50
  5. Step 5: Solve for x
    x = 7,703,858.50/3,911.78
  6. Step 6: Final answer
    x = 1,969.40

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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.