Home / 12,138.83-18,209.25-3,255.42

Finding the Fourth Proportional to 12,138.83, 18,209.25 and 3,255.42

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Solution

The fourth proportional to 12,138.83, 18,209.25 and 3,255.42 is: 4,883.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138.83 : 18,209.25 = 3,255.42 : x
  2. Step 2: Convert to fraction form
    12,138.83/18,209.25 = 3,255.42/x
  3. Step 3: Cross multiply
    12,138.83x = 18,209.25 × 3,255.42
  4. Step 4: Simplify right side
    12,138.83x = 59,278,756.64
  5. Step 5: Solve for x
    x = 59,278,756.64/12,138.83
  6. Step 6: Final answer
    x = 4,883.40

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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.