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Finding the Fourth Proportional to 12,951.78, 19,427.67 and 8,363.94

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Solution

The fourth proportional to 12,951.78, 19,427.67 and 8,363.94 is: 12,545.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,951.78 : 19,427.67 = 8,363.94 : x
  2. Step 2: Convert to fraction form
    12,951.78/19,427.67 = 8,363.94/x
  3. Step 3: Cross multiply
    12,951.78x = 19,427.67 × 8,363.94
  4. Step 4: Simplify right side
    12,951.78x = 162,491,866.22
  5. Step 5: Solve for x
    x = 162,491,866.22/12,951.78
  6. Step 6: Final answer
    x = 12,545.91

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Similar ratio
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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.