Home / 20,850.06-31,280.93-8,378.84

Finding the Fourth Proportional to 20,850.06, 31,280.93 and 8,378.84

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Solution

The fourth proportional to 20,850.06, 31,280.93 and 8,378.84 is: 12,570.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,850.06 : 31,280.93 = 8,378.84 : x
  2. Step 2: Convert to fraction form
    20,850.06/31,280.93 = 8,378.84/x
  3. Step 3: Cross multiply
    20,850.06x = 31,280.93 × 8,378.84
  4. Step 4: Simplify right side
    20,850.06x = 262,097,907.52
  5. Step 5: Solve for x
    x = 262,097,907.52/20,850.06
  6. Step 6: Final answer
    x = 12,570.61

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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.