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Finding the Fourth Proportional to 39,940.44, 55,078.44 and 30,984.68

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Solution

The fourth proportional to 39,940.44, 55,078.44 and 30,984.68 is: 42,728.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,940.44 : 55,078.44 = 30,984.68 : x
  2. Step 2: Convert to fraction form
    39,940.44/55,078.44 = 30,984.68/x
  3. Step 3: Cross multiply
    39,940.44x = 55,078.44 × 30,984.68
  4. Step 4: Simplify right side
    39,940.44x = 1,706,587,562.91
  5. Step 5: Solve for x
    x = 1,706,587,562.91/39,940.44
  6. Step 6: Final answer
    x = 42,728.31

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1.5x scale

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.