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Finding the Fourth Proportional to 11,696.10, 16,139.93 and 6,389.86

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Solution

The fourth proportional to 11,696.10, 16,139.93 and 6,389.86 is: 8,817.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,696.10 : 16,139.93 = 6,389.86 : x
  2. Step 2: Convert to fraction form
    11,696.10/16,139.93 = 6,389.86/x
  3. Step 3: Cross multiply
    11,696.10x = 16,139.93 × 6,389.86
  4. Step 4: Simplify right side
    11,696.10x = 103,131,893.11
  5. Step 5: Solve for x
    x = 103,131,893.11/11,696.10
  6. Step 6: Final answer
    x = 8,817.63

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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.