Home / 20,969.37-28,939.14-11,538.54

Finding the Fourth Proportional to 20,969.37, 28,939.14 and 11,538.54

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Solution

The fourth proportional to 20,969.37, 28,939.14 and 11,538.54 is: 15,923.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,969.37 : 28,939.14 = 11,538.54 : x
  2. Step 2: Convert to fraction form
    20,969.37/28,939.14 = 11,538.54/x
  3. Step 3: Cross multiply
    20,969.37x = 28,939.14 × 11,538.54
  4. Step 4: Simplify right side
    20,969.37x = 333,915,424.46
  5. Step 5: Solve for x
    x = 333,915,424.46/20,969.37
  6. Step 6: Final answer
    x = 15,923.96

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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.