Home / 13,722-18,936.39-7,434.37

Finding the Fourth Proportional to 13,722, 18,936.39 and 7,434.37

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Solution

The fourth proportional to 13,722, 18,936.39 and 7,434.37 is: 10,259.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,722 : 18,936.39 = 7,434.37 : x
  2. Step 2: Convert to fraction form
    13,722/18,936.39 = 7,434.37/x
  3. Step 3: Cross multiply
    13,722x = 18,936.39 × 7,434.37
  4. Step 4: Simplify right side
    13,722x = 140,780,129.72
  5. Step 5: Solve for x
    x = 140,780,129.72/13,722
  6. Step 6: Final answer
    x = 10,259.45

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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.