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Finding the Fourth Proportional to 11,208.21, 16,818 and 4,639.11

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Solution

The fourth proportional to 11,208.21, 16,818 and 4,639.11 is: 6,961.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,208.21 : 16,818 = 4,639.11 : x
  2. Step 2: Convert to fraction form
    11,208.21/16,818 = 4,639.11/x
  3. Step 3: Cross multiply
    11,208.21x = 16,818 × 4,639.11
  4. Step 4: Simplify right side
    11,208.21x = 78,020,551.98
  5. Step 5: Solve for x
    x = 78,020,551.98/11,208.21
  6. Step 6: Final answer
    x = 6,961.02

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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.