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Finding the Fourth Proportional to 12,647.99, 18,961.72 and 11,264.01

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Solution

The fourth proportional to 12,647.99, 18,961.72 and 11,264.01 is: 16,886.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,647.99 : 18,961.72 = 11,264.01 : x
  2. Step 2: Convert to fraction form
    12,647.99/18,961.72 = 11,264.01/x
  3. Step 3: Cross multiply
    12,647.99x = 18,961.72 × 11,264.01
  4. Step 4: Simplify right side
    12,647.99x = 213,584,975.54
  5. Step 5: Solve for x
    x = 213,584,975.54/12,647.99
  6. Step 6: Final answer
    x = 16,886.88

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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.