Home / 13,121.33-18,107.42-7,816.37

Finding the Fourth Proportional to 13,121.33, 18,107.42 and 7,816.37

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Solution

The fourth proportional to 13,121.33, 18,107.42 and 7,816.37 is: 10,786.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.33 : 18,107.42 = 7,816.37 : x
  2. Step 2: Convert to fraction form
    13,121.33/18,107.42 = 7,816.37/x
  3. Step 3: Cross multiply
    13,121.33x = 18,107.42 × 7,816.37
  4. Step 4: Simplify right side
    13,121.33x = 141,534,164.85
  5. Step 5: Solve for x
    x = 141,534,164.85/13,121.33
  6. Step 6: Final answer
    x = 10,786.58

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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.