Home / 39,768.93-54,879.73-21,863.81

Finding the Fourth Proportional to 39,768.93, 54,879.73 and 21,863.81

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Solution

The fourth proportional to 39,768.93, 54,879.73 and 21,863.81 is: 30,171.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,768.93 : 54,879.73 = 21,863.81 : x
  2. Step 2: Convert to fraction form
    39,768.93/54,879.73 = 21,863.81/x
  3. Step 3: Cross multiply
    39,768.93x = 54,879.73 × 21,863.81
  4. Step 4: Simplify right side
    39,768.93x = 1,199,879,763.41
  5. Step 5: Solve for x
    x = 1,199,879,763.41/39,768.93
  6. Step 6: Final answer
    x = 30,171.28

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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.