Home / 13,731.45-18,939.38-8,696.49

Finding the Fourth Proportional to 13,731.45, 18,939.38 and 8,696.49

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Solution

The fourth proportional to 13,731.45, 18,939.38 and 8,696.49 is: 11,994.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,731.45 : 18,939.38 = 8,696.49 : x
  2. Step 2: Convert to fraction form
    13,731.45/18,939.38 = 8,696.49/x
  3. Step 3: Cross multiply
    13,731.45x = 18,939.38 × 8,696.49
  4. Step 4: Simplify right side
    13,731.45x = 164,706,128.78
  5. Step 5: Solve for x
    x = 164,706,128.78/13,731.45
  6. Step 6: Final answer
    x = 11,994.81

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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.