Home / 12,211.75-18,299.40-7,825.60

Finding the Fourth Proportional to 12,211.75, 18,299.40 and 7,825.60

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Solution

The fourth proportional to 12,211.75, 18,299.40 and 7,825.60 is: 11,726.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,211.75 : 18,299.40 = 7,825.60 : x
  2. Step 2: Convert to fraction form
    12,211.75/18,299.40 = 7,825.60/x
  3. Step 3: Cross multiply
    12,211.75x = 18,299.40 × 7,825.60
  4. Step 4: Simplify right side
    12,211.75x = 143,203,784.64
  5. Step 5: Solve for x
    x = 143,203,784.64/12,211.75
  6. Step 6: Final answer
    x = 11,726.72

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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.