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Finding the Fourth Proportional to 21,550.64, 29,739.60 and 12,119.20

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Solution

The fourth proportional to 21,550.64, 29,739.60 and 12,119.20 is: 16,724.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,550.64 : 29,739.60 = 12,119.20 : x
  2. Step 2: Convert to fraction form
    21,550.64/29,739.60 = 12,119.20/x
  3. Step 3: Cross multiply
    21,550.64x = 29,739.60 × 12,119.20
  4. Step 4: Simplify right side
    21,550.64x = 360,420,160.32
  5. Step 5: Solve for x
    x = 360,420,160.32/21,550.64
  6. Step 6: Final answer
    x = 16,724.34

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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.