Home / 20,409.38-28,163.43-11,458.25

Finding the Fourth Proportional to 20,409.38, 28,163.43 and 11,458.25

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Solution

The fourth proportional to 20,409.38, 28,163.43 and 11,458.25 is: 15,811.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,409.38 : 28,163.43 = 11,458.25 : x
  2. Step 2: Convert to fraction form
    20,409.38/28,163.43 = 11,458.25/x
  3. Step 3: Cross multiply
    20,409.38x = 28,163.43 × 11,458.25
  4. Step 4: Simplify right side
    20,409.38x = 322,703,480.98
  5. Step 5: Solve for x
    x = 322,703,480.98/20,409.38
  6. Step 6: Final answer
    x = 15,811.53

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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.