Home / 20,928.81-28,883.79-11,977.59

Finding the Fourth Proportional to 20,928.81, 28,883.79 and 11,977.59

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Solution

The fourth proportional to 20,928.81, 28,883.79 and 11,977.59 is: 16,530.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.81 : 28,883.79 = 11,977.59 : x
  2. Step 2: Convert to fraction form
    20,928.81/28,883.79 = 11,977.59/x
  3. Step 3: Cross multiply
    20,928.81x = 28,883.79 × 11,977.59
  4. Step 4: Simplify right side
    20,928.81x = 345,958,194.27
  5. Step 5: Solve for x
    x = 345,958,194.27/20,928.81
  6. Step 6: Final answer
    x = 16,530.24

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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.