Home / 12,789.70-19,190.37-5,771.55

Finding the Fourth Proportional to 12,789.70, 19,190.37 and 5,771.55

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Solution

The fourth proportional to 12,789.70, 19,190.37 and 5,771.55 is: 8,659.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,789.70 : 19,190.37 = 5,771.55 : x
  2. Step 2: Convert to fraction form
    12,789.70/19,190.37 = 5,771.55/x
  3. Step 3: Cross multiply
    12,789.70x = 19,190.37 × 5,771.55
  4. Step 4: Simplify right side
    12,789.70x = 110,758,241.12
  5. Step 5: Solve for x
    x = 110,758,241.12/12,789.70
  6. Step 6: Final answer
    x = 8,659.96

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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.