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Finding the Fourth Proportional to 12,696.40, 19,016.76 and 8,238.40

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Solution

The fourth proportional to 12,696.40, 19,016.76 and 8,238.40 is: 12,339.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,696.40 : 19,016.76 = 8,238.40 : x
  2. Step 2: Convert to fraction form
    12,696.40/19,016.76 = 8,238.40/x
  3. Step 3: Cross multiply
    12,696.40x = 19,016.76 × 8,238.40
  4. Step 4: Simplify right side
    12,696.40x = 156,667,675.58
  5. Step 5: Solve for x
    x = 156,667,675.58/12,696.40
  6. Step 6: Final answer
    x = 12,339.54

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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.