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Finding the Fourth Proportional to 13,924.20, 19,212.39 and 8,821.20

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Solution

The fourth proportional to 13,924.20, 19,212.39 and 8,821.20 is: 12,171.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,924.20 : 19,212.39 = 8,821.20 : x
  2. Step 2: Convert to fraction form
    13,924.20/19,212.39 = 8,821.20/x
  3. Step 3: Cross multiply
    13,924.20x = 19,212.39 × 8,821.20
  4. Step 4: Simplify right side
    13,924.20x = 169,476,406.71
  5. Step 5: Solve for x
    x = 169,476,406.71/13,924.20
  6. Step 6: Final answer
    x = 12,171.35

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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.