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Finding the Fourth Proportional to 12,647.91, 18,974.70 and 3,883.71

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Solution

The fourth proportional to 12,647.91, 18,974.70 and 3,883.71 is: 5,826.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,647.91 : 18,974.70 = 3,883.71 : x
  2. Step 2: Convert to fraction form
    12,647.91/18,974.70 = 3,883.71/x
  3. Step 3: Cross multiply
    12,647.91x = 18,974.70 × 3,883.71
  4. Step 4: Simplify right side
    12,647.91x = 73,692,232.14
  5. Step 5: Solve for x
    x = 73,692,232.14/12,647.91
  6. Step 6: Final answer
    x = 5,826.44

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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.