Home / 13,800.09-20,700-3,939.33

Finding the Fourth Proportional to 13,800.09, 20,700 and 3,939.33

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Solution

The fourth proportional to 13,800.09, 20,700 and 3,939.33 is: 5,908.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,800.09 : 20,700 = 3,939.33 : x
  2. Step 2: Convert to fraction form
    13,800.09/20,700 = 3,939.33/x
  3. Step 3: Cross multiply
    13,800.09x = 20,700 × 3,939.33
  4. Step 4: Simplify right side
    13,800.09x = 81,544,131
  5. Step 5: Solve for x
    x = 81,544,131/13,800.09
  6. Step 6: Final answer
    x = 5,908.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.