Home / 3,940.42-5,917.93-2,642.80

Finding the Fourth Proportional to 3,940.42, 5,917.93 and 2,642.80

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Solution

The fourth proportional to 3,940.42, 5,917.93 and 2,642.80 is: 3,969.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.42 : 5,917.93 = 2,642.80 : x
  2. Step 2: Convert to fraction form
    3,940.42/5,917.93 = 2,642.80/x
  3. Step 3: Cross multiply
    3,940.42x = 5,917.93 × 2,642.80
  4. Step 4: Simplify right side
    3,940.42x = 15,639,905.40
  5. Step 5: Solve for x
    x = 15,639,905.40/3,940.42
  6. Step 6: Final answer
    x = 3,969.10

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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.