Home / 12,986.80-19,485.33-6,750.75

Finding the Fourth Proportional to 12,986.80, 19,485.33 and 6,750.75

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Solution

The fourth proportional to 12,986.80, 19,485.33 and 6,750.75 is: 10,128.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,986.80 : 19,485.33 = 6,750.75 : x
  2. Step 2: Convert to fraction form
    12,986.80/19,485.33 = 6,750.75/x
  3. Step 3: Cross multiply
    12,986.80x = 19,485.33 × 6,750.75
  4. Step 4: Simplify right side
    12,986.80x = 131,540,591.50
  5. Step 5: Solve for x
    x = 131,540,591.50/12,986.80
  6. Step 6: Final answer
    x = 10,128.79

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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.