Home / 20,309.31-30,387.42-11,993.85

Finding the Fourth Proportional to 20,309.31, 30,387.42 and 11,993.85

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Solution

The fourth proportional to 20,309.31, 30,387.42 and 11,993.85 is: 17,945.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,309.31 : 30,387.42 = 11,993.85 : x
  2. Step 2: Convert to fraction form
    20,309.31/30,387.42 = 11,993.85/x
  3. Step 3: Cross multiply
    20,309.31x = 30,387.42 × 11,993.85
  4. Step 4: Simplify right side
    20,309.31x = 364,462,157.37
  5. Step 5: Solve for x
    x = 364,462,157.37/20,309.31
  6. Step 6: Final answer
    x = 17,945.57

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1.5x scale

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.