Home / 12,425.60-17,147.39-7,120.73

Finding the Fourth Proportional to 12,425.60, 17,147.39 and 7,120.73

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Solution

The fourth proportional to 12,425.60, 17,147.39 and 7,120.73 is: 9,826.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,425.60 : 17,147.39 = 7,120.73 : x
  2. Step 2: Convert to fraction form
    12,425.60/17,147.39 = 7,120.73/x
  3. Step 3: Cross multiply
    12,425.60x = 17,147.39 × 7,120.73
  4. Step 4: Simplify right side
    12,425.60x = 122,101,813.05
  5. Step 5: Solve for x
    x = 122,101,813.05/12,425.60
  6. Step 6: Final answer
    x = 9,826.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.