Home / 39,768.90-54,880.32-21,863.73

Finding the Fourth Proportional to 39,768.90, 54,880.32 and 21,863.73

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Solution

The fourth proportional to 39,768.90, 54,880.32 and 21,863.73 is: 30,171.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,768.90 : 54,880.32 = 21,863.73 : x
  2. Step 2: Convert to fraction form
    39,768.90/54,880.32 = 21,863.73/x
  3. Step 3: Cross multiply
    39,768.90x = 54,880.32 × 21,863.73
  4. Step 4: Simplify right side
    39,768.90x = 1,199,888,498.79
  5. Step 5: Solve for x
    x = 1,199,888,498.79/39,768.90
  6. Step 6: Final answer
    x = 30,171.53

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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.