Home / 39,783.42-54,902.58-21,879.80

Finding the Fourth Proportional to 39,783.42, 54,902.58 and 21,879.80

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Solution

The fourth proportional to 39,783.42, 54,902.58 and 21,879.80 is: 30,194.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,783.42 : 54,902.58 = 21,879.80 : x
  2. Step 2: Convert to fraction form
    39,783.42/54,902.58 = 21,879.80/x
  3. Step 3: Cross multiply
    39,783.42x = 54,902.58 × 21,879.80
  4. Step 4: Simplify right side
    39,783.42x = 1,201,257,469.88
  5. Step 5: Solve for x
    x = 1,201,257,469.88/39,783.42
  6. Step 6: Final answer
    x = 30,194.93

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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.