Home / 28,809.75-39,768.39-19,383.78

Finding the Fourth Proportional to 28,809.75, 39,768.39 and 19,383.78

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Solution

The fourth proportional to 28,809.75, 39,768.39 and 19,383.78 is: 26,756.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,809.75 : 39,768.39 = 19,383.78 : x
  2. Step 2: Convert to fraction form
    28,809.75/39,768.39 = 19,383.78/x
  3. Step 3: Cross multiply
    28,809.75x = 39,768.39 × 19,383.78
  4. Step 4: Simplify right side
    28,809.75x = 770,861,722.71
  5. Step 5: Solve for x
    x = 770,861,722.71/28,809.75
  6. Step 6: Final answer
    x = 26,756.97

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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.