Home / 20,889.95-31,327.07-8,405.73

Finding the Fourth Proportional to 20,889.95, 31,327.07 and 8,405.73

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Solution

The fourth proportional to 20,889.95, 31,327.07 and 8,405.73 is: 12,605.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,889.95 : 31,327.07 = 8,405.73 : x
  2. Step 2: Convert to fraction form
    20,889.95/31,327.07 = 8,405.73/x
  3. Step 3: Cross multiply
    20,889.95x = 31,327.07 × 8,405.73
  4. Step 4: Simplify right side
    20,889.95x = 263,326,850.08
  5. Step 5: Solve for x
    x = 263,326,850.08/20,889.95
  6. Step 6: Final answer
    x = 12,605.44

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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.