Home / 3,812.85-5,717.90-2,640.07

Finding the Fourth Proportional to 3,812.85, 5,717.90 and 2,640.07

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Solution

The fourth proportional to 3,812.85, 5,717.90 and 2,640.07 is: 3,959.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,812.85 : 5,717.90 = 2,640.07 : x
  2. Step 2: Convert to fraction form
    3,812.85/5,717.90 = 2,640.07/x
  3. Step 3: Cross multiply
    3,812.85x = 5,717.90 × 2,640.07
  4. Step 4: Simplify right side
    3,812.85x = 15,095,656.25
  5. Step 5: Solve for x
    x = 15,095,656.25/3,812.85
  6. Step 6: Final answer
    x = 3,959.15

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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.