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Finding the Fourth Proportional to 8,669.69, 11,969.03 and 6,649.28

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Solution

The fourth proportional to 8,669.69, 11,969.03 and 6,649.28 is: 9,179.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,669.69 : 11,969.03 = 6,649.28 : x
  2. Step 2: Convert to fraction form
    8,669.69/11,969.03 = 6,649.28/x
  3. Step 3: Cross multiply
    8,669.69x = 11,969.03 × 6,649.28
  4. Step 4: Simplify right side
    8,669.69x = 79,585,431.80
  5. Step 5: Solve for x
    x = 79,585,431.80/8,669.69
  6. Step 6: Final answer
    x = 9,179.73

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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.