Home / 10,425.21-15,640.30-3,405.28

Finding the Fourth Proportional to 10,425.21, 15,640.30 and 3,405.28

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Solution

The fourth proportional to 10,425.21, 15,640.30 and 3,405.28 is: 5,108.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,425.21 : 15,640.30 = 3,405.28 : x
  2. Step 2: Convert to fraction form
    10,425.21/15,640.30 = 3,405.28/x
  3. Step 3: Cross multiply
    10,425.21x = 15,640.30 × 3,405.28
  4. Step 4: Simplify right side
    10,425.21x = 53,259,544.66
  5. Step 5: Solve for x
    x = 53,259,544.66/10,425.21
  6. Step 6: Final answer
    x = 5,108.73

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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.