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Finding the Fourth Proportional to 8,668.45, 11,969.57 and 5,486.91

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Solution

The fourth proportional to 8,668.45, 11,969.57 and 5,486.91 is: 7,576.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,668.45 : 11,969.57 = 5,486.91 : x
  2. Step 2: Convert to fraction form
    8,668.45/11,969.57 = 5,486.91/x
  3. Step 3: Cross multiply
    8,668.45x = 11,969.57 × 5,486.91
  4. Step 4: Simplify right side
    8,668.45x = 65,675,922.16
  5. Step 5: Solve for x
    x = 65,675,922.16/8,668.45
  6. Step 6: Final answer
    x = 7,576.43

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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.