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Finding the Fourth Proportional to 12,659.28, 18,992.76 and 8,968.65

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Solution

The fourth proportional to 12,659.28, 18,992.76 and 8,968.65 is: 13,455.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,659.28 : 18,992.76 = 8,968.65 : x
  2. Step 2: Convert to fraction form
    12,659.28/18,992.76 = 8,968.65/x
  3. Step 3: Cross multiply
    12,659.28x = 18,992.76 × 8,968.65
  4. Step 4: Simplify right side
    12,659.28x = 170,339,322.01
  5. Step 5: Solve for x
    x = 170,339,322.01/12,659.28
  6. Step 6: Final answer
    x = 13,455.69

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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.