Home / 20,928.82-28,883.80-11,977.60

Finding the Fourth Proportional to 20,928.82, 28,883.80 and 11,977.60

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Solution

The fourth proportional to 20,928.82, 28,883.80 and 11,977.60 is: 16,530.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.82 : 28,883.80 = 11,977.60 : x
  2. Step 2: Convert to fraction form
    20,928.82/28,883.80 = 11,977.60/x
  3. Step 3: Cross multiply
    20,928.82x = 28,883.80 × 11,977.60
  4. Step 4: Simplify right side
    20,928.82x = 345,958,602.88
  5. Step 5: Solve for x
    x = 345,958,602.88/20,928.82
  6. Step 6: Final answer
    x = 16,530.25

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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.