Home / 13,725.78-18,933.12-11,961.60

Finding the Fourth Proportional to 13,725.78, 18,933.12 and 11,961.60

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Solution

The fourth proportional to 13,725.78, 18,933.12 and 11,961.60 is: 16,499.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,725.78 : 18,933.12 = 11,961.60 : x
  2. Step 2: Convert to fraction form
    13,725.78/18,933.12 = 11,961.60/x
  3. Step 3: Cross multiply
    13,725.78x = 18,933.12 × 11,961.60
  4. Step 4: Simplify right side
    13,725.78x = 226,470,408.19
  5. Step 5: Solve for x
    x = 226,470,408.19/13,725.78
  6. Step 6: Final answer
    x = 16,499.64

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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.