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Finding the Fourth Proportional to 12,696.60, 19,039.86 and 4,906.20

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Solution

The fourth proportional to 12,696.60, 19,039.86 and 4,906.20 is: 7,357.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,696.60 : 19,039.86 = 4,906.20 : x
  2. Step 2: Convert to fraction form
    12,696.60/19,039.86 = 4,906.20/x
  3. Step 3: Cross multiply
    12,696.60x = 19,039.86 × 4,906.20
  4. Step 4: Simplify right side
    12,696.60x = 93,413,361.13
  5. Step 5: Solve for x
    x = 93,413,361.13/12,696.60
  6. Step 6: Final answer
    x = 7,357.35

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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.