Home / 20,833.80-28,749.94-11,884.20

Finding the Fourth Proportional to 20,833.80, 28,749.94 and 11,884.20

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Solution

The fourth proportional to 20,833.80, 28,749.94 and 11,884.20 is: 16,399.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,833.80 : 28,749.94 = 11,884.20 : x
  2. Step 2: Convert to fraction form
    20,833.80/28,749.94 = 11,884.20/x
  3. Step 3: Cross multiply
    20,833.80x = 28,749.94 × 11,884.20
  4. Step 4: Simplify right side
    20,833.80x = 341,670,036.95
  5. Step 5: Solve for x
    x = 341,670,036.95/20,833.80
  6. Step 6: Final answer
    x = 16,399.79

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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.