Home / 20,769.69-28,661.16-11,816.36

Finding the Fourth Proportional to 20,769.69, 28,661.16 and 11,816.36

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Solution

The fourth proportional to 20,769.69, 28,661.16 and 11,816.36 is: 16,305.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,769.69 : 28,661.16 = 11,816.36 : x
  2. Step 2: Convert to fraction form
    20,769.69/28,661.16 = 11,816.36/x
  3. Step 3: Cross multiply
    20,769.69x = 28,661.16 × 11,816.36
  4. Step 4: Simplify right side
    20,769.69x = 338,670,441.27
  5. Step 5: Solve for x
    x = 338,670,441.27/20,769.69
  6. Step 6: Final answer
    x = 16,305.99

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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.