Home / 39,845.23-54,986.78-21,940.64

Finding the Fourth Proportional to 39,845.23, 54,986.78 and 21,940.64

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Solution

The fourth proportional to 39,845.23, 54,986.78 and 21,940.64 is: 30,278.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,845.23 : 54,986.78 = 21,940.64 : x
  2. Step 2: Convert to fraction form
    39,845.23/54,986.78 = 21,940.64/x
  3. Step 3: Cross multiply
    39,845.23x = 54,986.78 × 21,940.64
  4. Step 4: Simplify right side
    39,845.23x = 1,206,445,144.74
  5. Step 5: Solve for x
    x = 1,206,445,144.74/39,845.23
  6. Step 6: Final answer
    x = 30,278.29

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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.