Home / 12,109.61-18,163.72-3,788.64

Finding the Fourth Proportional to 12,109.61, 18,163.72 and 3,788.64

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Solution

The fourth proportional to 12,109.61, 18,163.72 and 3,788.64 is: 5,682.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,109.61 : 18,163.72 = 3,788.64 : x
  2. Step 2: Convert to fraction form
    12,109.61/18,163.72 = 3,788.64/x
  3. Step 3: Cross multiply
    12,109.61x = 18,163.72 × 3,788.64
  4. Step 4: Simplify right side
    12,109.61x = 68,815,796.14
  5. Step 5: Solve for x
    x = 68,815,796.14/12,109.61
  6. Step 6: Final answer
    x = 5,682.74

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1.5x scale

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.