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Finding the Fourth Proportional to 11,687.94, 16,128.77 and 6,381.77

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Solution

The fourth proportional to 11,687.94, 16,128.77 and 6,381.77 is: 8,806.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,687.94 : 16,128.77 = 6,381.77 : x
  2. Step 2: Convert to fraction form
    11,687.94/16,128.77 = 6,381.77/x
  3. Step 3: Cross multiply
    11,687.94x = 16,128.77 × 6,381.77
  4. Step 4: Simplify right side
    11,687.94x = 102,929,987.97
  5. Step 5: Solve for x
    x = 102,929,987.97/11,687.94
  6. Step 6: Final answer
    x = 8,806.51

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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.