Home / 20,557.60-30,786.68-11,765.86

Finding the Fourth Proportional to 20,557.60, 30,786.68 and 11,765.86

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Solution

The fourth proportional to 20,557.60, 30,786.68 and 11,765.86 is: 17,620.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,557.60 : 30,786.68 = 11,765.86 : x
  2. Step 2: Convert to fraction form
    20,557.60/30,786.68 = 11,765.86/x
  3. Step 3: Cross multiply
    20,557.60x = 30,786.68 × 11,765.86
  4. Step 4: Simplify right side
    20,557.60x = 362,231,766.74
  5. Step 5: Solve for x
    x = 362,231,766.74/20,557.60
  6. Step 6: Final answer
    x = 17,620.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.