Home / 13,722.82-18,936.36-7,755

Finding the Fourth Proportional to 13,722.82, 18,936.36 and 7,755

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Solution

The fourth proportional to 13,722.82, 18,936.36 and 7,755 is: 10,701.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,722.82 : 18,936.36 = 7,755 : x
  2. Step 2: Convert to fraction form
    13,722.82/18,936.36 = 7,755/x
  3. Step 3: Cross multiply
    13,722.82x = 18,936.36 × 7,755
  4. Step 4: Simplify right side
    13,722.82x = 146,851,471.80
  5. Step 5: Solve for x
    x = 146,851,471.80/13,722.82
  6. Step 6: Final answer
    x = 10,701.26

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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.