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Finding the Fourth Proportional to 9,986.62, 13,782.81 and 5,794.78

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Solution

The fourth proportional to 9,986.62, 13,782.81 and 5,794.78 is: 7,997.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,986.62 : 13,782.81 = 5,794.78 : x
  2. Step 2: Convert to fraction form
    9,986.62/13,782.81 = 5,794.78/x
  3. Step 3: Cross multiply
    9,986.62x = 13,782.81 × 5,794.78
  4. Step 4: Simplify right side
    9,986.62x = 79,868,351.73
  5. Step 5: Solve for x
    x = 79,868,351.73/9,986.62
  6. Step 6: Final answer
    x = 7,997.54

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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.