Home / 20,765.58-31,148.39-5,183.21

Finding the Fourth Proportional to 20,765.58, 31,148.39 and 5,183.21

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Solution

The fourth proportional to 20,765.58, 31,148.39 and 5,183.21 is: 7,774.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,765.58 : 31,148.39 = 5,183.21 : x
  2. Step 2: Convert to fraction form
    20,765.58/31,148.39 = 5,183.21/x
  3. Step 3: Cross multiply
    20,765.58x = 31,148.39 × 5,183.21
  4. Step 4: Simplify right side
    20,765.58x = 161,448,464.87
  5. Step 5: Solve for x
    x = 161,448,464.87/20,765.58
  6. Step 6: Final answer
    x = 7,774.81

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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.