Home / 39,768.80-54,880.45-21,863.65

Finding the Fourth Proportional to 39,768.80, 54,880.45 and 21,863.65

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Solution

The fourth proportional to 39,768.80, 54,880.45 and 21,863.65 is: 30,171.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,768.80 : 54,880.45 = 21,863.65 : x
  2. Step 2: Convert to fraction form
    39,768.80/54,880.45 = 21,863.65/x
  3. Step 3: Cross multiply
    39,768.80x = 54,880.45 × 21,863.65
  4. Step 4: Simplify right side
    39,768.80x = 1,199,886,738.08
  5. Step 5: Solve for x
    x = 1,199,886,738.08/39,768.80
  6. Step 6: Final answer
    x = 30,171.56

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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.