Home / 20,321.96-30,491.68-7,850.76

Finding the Fourth Proportional to 20,321.96, 30,491.68 and 7,850.76

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Solution

The fourth proportional to 20,321.96, 30,491.68 and 7,850.76 is: 11,779.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,321.96 : 30,491.68 = 7,850.76 : x
  2. Step 2: Convert to fraction form
    20,321.96/30,491.68 = 7,850.76/x
  3. Step 3: Cross multiply
    20,321.96x = 30,491.68 × 7,850.76
  4. Step 4: Simplify right side
    20,321.96x = 239,382,860.02
  5. Step 5: Solve for x
    x = 239,382,860.02/20,321.96
  6. Step 6: Final answer
    x = 11,779.52

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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.