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Finding the Fourth Proportional to 6,661.09, 9,991.64 and 2,279.80

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Solution

The fourth proportional to 6,661.09, 9,991.64 and 2,279.80 is: 3,419.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,661.09 : 9,991.64 = 2,279.80 : x
  2. Step 2: Convert to fraction form
    6,661.09/9,991.64 = 2,279.80/x
  3. Step 3: Cross multiply
    6,661.09x = 9,991.64 × 2,279.80
  4. Step 4: Simplify right side
    6,661.09x = 22,778,940.87
  5. Step 5: Solve for x
    x = 22,778,940.87/6,661.09
  6. Step 6: Final answer
    x = 3,419.70

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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.