Home / 20,851.23-31,282.69-8,380.02

Finding the Fourth Proportional to 20,851.23, 31,282.69 and 8,380.02

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Solution

The fourth proportional to 20,851.23, 31,282.69 and 8,380.02 is: 12,572.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,851.23 : 31,282.69 = 8,380.02 : x
  2. Step 2: Convert to fraction form
    20,851.23/31,282.69 = 8,380.02/x
  3. Step 3: Cross multiply
    20,851.23x = 31,282.69 × 8,380.02
  4. Step 4: Simplify right side
    20,851.23x = 262,149,567.85
  5. Step 5: Solve for x
    x = 262,149,567.85/20,851.23
  6. Step 6: Final answer
    x = 12,572.38

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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.