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Finding the Fourth Proportional to 38,559.78, 57,839.73 and 10,857.78

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Solution

The fourth proportional to 38,559.78, 57,839.73 and 10,857.78 is: 16,286.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,559.78 : 57,839.73 = 10,857.78 : x
  2. Step 2: Convert to fraction form
    38,559.78/57,839.73 = 10,857.78/x
  3. Step 3: Cross multiply
    38,559.78x = 57,839.73 × 10,857.78
  4. Step 4: Simplify right side
    38,559.78x = 628,011,063.60
  5. Step 5: Solve for x
    x = 628,011,063.60/38,559.78
  6. Step 6: Final answer
    x = 16,286.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.