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Finding the Fourth Proportional to 12,696.76, 19,039.05 and 7,286.59

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Solution

The fourth proportional to 12,696.76, 19,039.05 and 7,286.59 is: 10,926.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,696.76 : 19,039.05 = 7,286.59 : x
  2. Step 2: Convert to fraction form
    12,696.76/19,039.05 = 7,286.59/x
  3. Step 3: Cross multiply
    12,696.76x = 19,039.05 × 7,286.59
  4. Step 4: Simplify right side
    12,696.76x = 138,729,751.34
  5. Step 5: Solve for x
    x = 138,729,751.34/12,696.76
  6. Step 6: Final answer
    x = 10,926.39

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1.5x scale

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.