Home / 12,425.44-17,147.55-7,121.28

Finding the Fourth Proportional to 12,425.44, 17,147.55 and 7,121.28

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Solution

The fourth proportional to 12,425.44, 17,147.55 and 7,121.28 is: 9,827.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,425.44 : 17,147.55 = 7,121.28 : x
  2. Step 2: Convert to fraction form
    12,425.44/17,147.55 = 7,121.28/x
  3. Step 3: Cross multiply
    12,425.44x = 17,147.55 × 7,121.28
  4. Step 4: Simplify right side
    12,425.44x = 122,112,504.86
  5. Step 5: Solve for x
    x = 122,112,504.86/12,425.44
  6. Step 6: Final answer
    x = 9,827.62

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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.