Home / 20,769.45-28,661.61-11,338.02

Finding the Fourth Proportional to 20,769.45, 28,661.61 and 11,338.02

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Solution

The fourth proportional to 20,769.45, 28,661.61 and 11,338.02 is: 15,646.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,769.45 : 28,661.61 = 11,338.02 : x
  2. Step 2: Convert to fraction form
    20,769.45/28,661.61 = 11,338.02/x
  3. Step 3: Cross multiply
    20,769.45x = 28,661.61 × 11,338.02
  4. Step 4: Simplify right side
    20,769.45x = 324,965,907.41
  5. Step 5: Solve for x
    x = 324,965,907.41/20,769.45
  6. Step 6: Final answer
    x = 15,646.34

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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.