Home / 20,889.66-28,829.34-12,936.54

Finding the Fourth Proportional to 20,889.66, 28,829.34 and 12,936.54

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Solution

The fourth proportional to 20,889.66, 28,829.34 and 12,936.54 is: 17,853.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,889.66 : 28,829.34 = 12,936.54 : x
  2. Step 2: Convert to fraction form
    20,889.66/28,829.34 = 12,936.54/x
  3. Step 3: Cross multiply
    20,889.66x = 28,829.34 × 12,936.54
  4. Step 4: Simplify right side
    20,889.66x = 372,951,910.08
  5. Step 5: Solve for x
    x = 372,951,910.08/20,889.66
  6. Step 6: Final answer
    x = 17,853.42

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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.