Home / 39,783.94-54,902.22-21,879.07

Finding the Fourth Proportional to 39,783.94, 54,902.22 and 21,879.07

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Solution

The fourth proportional to 39,783.94, 54,902.22 and 21,879.07 is: 30,193.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,783.94 : 54,902.22 = 21,879.07 : x
  2. Step 2: Convert to fraction form
    39,783.94/54,902.22 = 21,879.07/x
  3. Step 3: Cross multiply
    39,783.94x = 54,902.22 × 21,879.07
  4. Step 4: Simplify right side
    39,783.94x = 1,201,209,514.54
  5. Step 5: Solve for x
    x = 1,201,209,514.54/39,783.94
  6. Step 6: Final answer
    x = 30,193.33

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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.