Home / 12,439.44-18,648-11,357.28

Finding the Fourth Proportional to 12,439.44, 18,648 and 11,357.28

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Solution

The fourth proportional to 12,439.44, 18,648 and 11,357.28 is: 17,025.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,439.44 : 18,648 = 11,357.28 : x
  2. Step 2: Convert to fraction form
    12,439.44/18,648 = 11,357.28/x
  3. Step 3: Cross multiply
    12,439.44x = 18,648 × 11,357.28
  4. Step 4: Simplify right side
    12,439.44x = 211,790,557.44
  5. Step 5: Solve for x
    x = 211,790,557.44/12,439.44
  6. Step 6: Final answer
    x = 17,025.73

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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.