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Finding the Fourth Proportional to 7,816.60, 10,786.80 and 4,279.60

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Solution

The fourth proportional to 7,816.60, 10,786.80 and 4,279.60 is: 5,905.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,816.60 : 10,786.80 = 4,279.60 : x
  2. Step 2: Convert to fraction form
    7,816.60/10,786.80 = 4,279.60/x
  3. Step 3: Cross multiply
    7,816.60x = 10,786.80 × 4,279.60
  4. Step 4: Simplify right side
    7,816.60x = 46,163,189.28
  5. Step 5: Solve for x
    x = 46,163,189.28/7,816.60
  6. Step 6: Final answer
    x = 5,905.79

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.