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Finding the Fourth Proportional to 12,425.61, 17,147.94 and 7,120.44

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Solution

The fourth proportional to 12,425.61, 17,147.94 and 7,120.44 is: 9,826.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,425.61 : 17,147.94 = 7,120.44 : x
  2. Step 2: Convert to fraction form
    12,425.61/17,147.94 = 7,120.44/x
  3. Step 3: Cross multiply
    12,425.61x = 17,147.94 × 7,120.44
  4. Step 4: Simplify right side
    12,425.61x = 122,100,756.55
  5. Step 5: Solve for x
    x = 122,100,756.55/12,425.61
  6. Step 6: Final answer
    x = 9,826.54

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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.