Home / 12,147.21-18,221.30-3,382.89

Finding the Fourth Proportional to 12,147.21, 18,221.30 and 3,382.89

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Solution

The fourth proportional to 12,147.21, 18,221.30 and 3,382.89 is: 5,074.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,147.21 : 18,221.30 = 3,382.89 : x
  2. Step 2: Convert to fraction form
    12,147.21/18,221.30 = 3,382.89/x
  3. Step 3: Cross multiply
    12,147.21x = 18,221.30 × 3,382.89
  4. Step 4: Simplify right side
    12,147.21x = 61,640,636.64
  5. Step 5: Solve for x
    x = 61,640,636.64/12,147.21
  6. Step 6: Final answer
    x = 5,074.47

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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.