Home / 20,940.82-31,403.02-8,458.52

Finding the Fourth Proportional to 20,940.82, 31,403.02 and 8,458.52

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Solution

The fourth proportional to 20,940.82, 31,403.02 and 8,458.52 is: 12,684.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.82 : 31,403.02 = 8,458.52 : x
  2. Step 2: Convert to fraction form
    20,940.82/31,403.02 = 8,458.52/x
  3. Step 3: Cross multiply
    20,940.82x = 31,403.02 × 8,458.52
  4. Step 4: Simplify right side
    20,940.82x = 265,623,072.73
  5. Step 5: Solve for x
    x = 265,623,072.73/20,940.82
  6. Step 6: Final answer
    x = 12,684.46

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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.