Home / 39,879.20-55,032.54-21,975.86

Finding the Fourth Proportional to 39,879.20, 55,032.54 and 21,975.86

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Solution

The fourth proportional to 39,879.20, 55,032.54 and 21,975.86 is: 30,326.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,879.20 : 55,032.54 = 21,975.86 : x
  2. Step 2: Convert to fraction form
    39,879.20/55,032.54 = 21,975.86/x
  3. Step 3: Cross multiply
    39,879.20x = 55,032.54 × 21,975.86
  4. Step 4: Simplify right side
    39,879.20x = 1,209,387,394.48
  5. Step 5: Solve for x
    x = 1,209,387,394.48/39,879.20
  6. Step 6: Final answer
    x = 30,326.27

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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.