Home / 12,171.05-18,256.62-3,405.95

Finding the Fourth Proportional to 12,171.05, 18,256.62 and 3,405.95

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Solution

The fourth proportional to 12,171.05, 18,256.62 and 3,405.95 is: 5,108.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,171.05 : 18,256.62 = 3,405.95 : x
  2. Step 2: Convert to fraction form
    12,171.05/18,256.62 = 3,405.95/x
  3. Step 3: Cross multiply
    12,171.05x = 18,256.62 × 3,405.95
  4. Step 4: Simplify right side
    12,171.05x = 62,181,134.89
  5. Step 5: Solve for x
    x = 62,181,134.89/12,171.05
  6. Step 6: Final answer
    x = 5,108.94

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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.