Home / 20,769.39-28,662.36-11,338.56

Finding the Fourth Proportional to 20,769.39, 28,662.36 and 11,338.56

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Solution

The fourth proportional to 20,769.39, 28,662.36 and 11,338.56 is: 15,647.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,769.39 : 28,662.36 = 11,338.56 : x
  2. Step 2: Convert to fraction form
    20,769.39/28,662.36 = 11,338.56/x
  3. Step 3: Cross multiply
    20,769.39x = 28,662.36 × 11,338.56
  4. Step 4: Simplify right side
    20,769.39x = 324,989,888.60
  5. Step 5: Solve for x
    x = 324,989,888.60/20,769.39
  6. Step 6: Final answer
    x = 15,647.54

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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.