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Finding the Fourth Proportional to 12,636.39, 18,949.08 and 6,711.98

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Solution

The fourth proportional to 12,636.39, 18,949.08 and 6,711.98 is: 10,065.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,636.39 : 18,949.08 = 6,711.98 : x
  2. Step 2: Convert to fraction form
    12,636.39/18,949.08 = 6,711.98/x
  3. Step 3: Cross multiply
    12,636.39x = 18,949.08 × 6,711.98
  4. Step 4: Simplify right side
    12,636.39x = 127,185,845.98
  5. Step 5: Solve for x
    x = 127,185,845.98/12,636.39
  6. Step 6: Final answer
    x = 10,065.05

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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.