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Finding the Fourth Proportional to 12,951.09, 17,879.94 and 8,708.31

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Solution

The fourth proportional to 12,951.09, 17,879.94 and 8,708.31 is: 12,022.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,951.09 : 17,879.94 = 8,708.31 : x
  2. Step 2: Convert to fraction form
    12,951.09/17,879.94 = 8,708.31/x
  3. Step 3: Cross multiply
    12,951.09x = 17,879.94 × 8,708.31
  4. Step 4: Simplify right side
    12,951.09x = 155,704,060.30
  5. Step 5: Solve for x
    x = 155,704,060.30/12,951.09
  6. Step 6: Final answer
    x = 12,022.47

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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.