Home / 20,850.23-31,281.19-8,379.02

Finding the Fourth Proportional to 20,850.23, 31,281.19 and 8,379.02

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Solution

The fourth proportional to 20,850.23, 31,281.19 and 8,379.02 is: 12,570.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,850.23 : 31,281.19 = 8,379.02 : x
  2. Step 2: Convert to fraction form
    20,850.23/31,281.19 = 8,379.02/x
  3. Step 3: Cross multiply
    20,850.23x = 31,281.19 × 8,379.02
  4. Step 4: Simplify right side
    20,850.23x = 262,105,773.89
  5. Step 5: Solve for x
    x = 262,105,773.89/20,850.23
  6. Step 6: Final answer
    x = 12,570.88

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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.