Home / 20,769.42-28,662.21-11,338.32

Finding the Fourth Proportional to 20,769.42, 28,662.21 and 11,338.32

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Solution

The fourth proportional to 20,769.42, 28,662.21 and 11,338.32 is: 15,647.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,769.42 : 28,662.21 = 11,338.32 : x
  2. Step 2: Convert to fraction form
    20,769.42/28,662.21 = 11,338.32/x
  3. Step 3: Cross multiply
    20,769.42x = 28,662.21 × 11,338.32
  4. Step 4: Simplify right side
    20,769.42x = 324,981,308.89
  5. Step 5: Solve for x
    x = 324,981,308.89/20,769.42
  6. Step 6: Final answer
    x = 15,647.11

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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.