Home / 12,764.40-19,147.20-3,999.60

Finding the Fourth Proportional to 12,764.40, 19,147.20 and 3,999.60

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Solution

The fourth proportional to 12,764.40, 19,147.20 and 3,999.60 is: 5,999.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,764.40 : 19,147.20 = 3,999.60 : x
  2. Step 2: Convert to fraction form
    12,764.40/19,147.20 = 3,999.60/x
  3. Step 3: Cross multiply
    12,764.40x = 19,147.20 × 3,999.60
  4. Step 4: Simplify right side
    12,764.40x = 76,581,141.12
  5. Step 5: Solve for x
    x = 76,581,141.12/12,764.40
  6. Step 6: Final answer
    x = 5,999.59

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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.