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Finding the Fourth Proportional to 12,687.02, 17,514.72 and 7,908.42

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Solution

The fourth proportional to 12,687.02, 17,514.72 and 7,908.42 is: 10,917.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,687.02 : 17,514.72 = 7,908.42 : x
  2. Step 2: Convert to fraction form
    12,687.02/17,514.72 = 7,908.42/x
  3. Step 3: Cross multiply
    12,687.02x = 17,514.72 × 7,908.42
  4. Step 4: Simplify right side
    12,687.02x = 138,513,761.94
  5. Step 5: Solve for x
    x = 138,513,761.94/12,687.02
  6. Step 6: Final answer
    x = 10,917.75

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