Home / 11,149.64-15,381.06-9,380.60

Finding the Fourth Proportional to 11,149.64, 15,381.06 and 9,380.60

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Solution

The fourth proportional to 11,149.64, 15,381.06 and 9,380.60 is: 12,940.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,149.64 : 15,381.06 = 9,380.60 : x
  2. Step 2: Convert to fraction form
    11,149.64/15,381.06 = 9,380.60/x
  3. Step 3: Cross multiply
    11,149.64x = 15,381.06 × 9,380.60
  4. Step 4: Simplify right side
    11,149.64x = 144,283,571.44
  5. Step 5: Solve for x
    x = 144,283,571.44/11,149.64
  6. Step 6: Final answer
    x = 12,940.65

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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.