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Finding the Fourth Proportional to 12,879.48, 17,771.63 and 7,214.48

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Solution

The fourth proportional to 12,879.48, 17,771.63 and 7,214.48 is: 9,954.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,879.48 : 17,771.63 = 7,214.48 : x
  2. Step 2: Convert to fraction form
    12,879.48/17,771.63 = 7,214.48/x
  3. Step 3: Cross multiply
    12,879.48x = 17,771.63 × 7,214.48
  4. Step 4: Simplify right side
    12,879.48x = 128,213,069.20
  5. Step 5: Solve for x
    x = 128,213,069.20/12,879.48
  6. Step 6: Final answer
    x = 9,954.83

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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.