Home / 20,879.28-28,812.82-11,926.60

Finding the Fourth Proportional to 20,879.28, 28,812.82 and 11,926.60

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Solution

The fourth proportional to 20,879.28, 28,812.82 and 11,926.60 is: 16,458.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,879.28 : 28,812.82 = 11,926.60 : x
  2. Step 2: Convert to fraction form
    20,879.28/28,812.82 = 11,926.60/x
  3. Step 3: Cross multiply
    20,879.28x = 28,812.82 × 11,926.60
  4. Step 4: Simplify right side
    20,879.28x = 343,638,979.01
  5. Step 5: Solve for x
    x = 343,638,979.01/20,879.28
  6. Step 6: Final answer
    x = 16,458.37

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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.