Home / 20,769.73-28,662.29-11,338.45

Finding the Fourth Proportional to 20,769.73, 28,662.29 and 11,338.45

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Solution

The fourth proportional to 20,769.73, 28,662.29 and 11,338.45 is: 15,647.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,769.73 : 28,662.29 = 11,338.45 : x
  2. Step 2: Convert to fraction form
    20,769.73/28,662.29 = 11,338.45/x
  3. Step 3: Cross multiply
    20,769.73x = 28,662.29 × 11,338.45
  4. Step 4: Simplify right side
    20,769.73x = 324,985,942.05
  5. Step 5: Solve for x
    x = 324,985,942.05/20,769.73
  6. Step 6: Final answer
    x = 15,647.10

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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.