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Finding the Fourth Proportional to 12,449.88, 17,174.16 and 7,968.81

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Solution

The fourth proportional to 12,449.88, 17,174.16 and 7,968.81 is: 10,992.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,449.88 : 17,174.16 = 7,968.81 : x
  2. Step 2: Convert to fraction form
    12,449.88/17,174.16 = 7,968.81/x
  3. Step 3: Cross multiply
    12,449.88x = 17,174.16 × 7,968.81
  4. Step 4: Simplify right side
    12,449.88x = 136,857,617.95
  5. Step 5: Solve for x
    x = 136,857,617.95/12,449.88
  6. Step 6: Final answer
    x = 10,992.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.