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Finding the Fourth Proportional to 11,940.30, 17,910.45 and 9,180.90

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Solution

The fourth proportional to 11,940.30, 17,910.45 and 9,180.90 is: 13,771.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,940.30 : 17,910.45 = 9,180.90 : x
  2. Step 2: Convert to fraction form
    11,940.30/17,910.45 = 9,180.90/x
  3. Step 3: Cross multiply
    11,940.30x = 17,910.45 × 9,180.90
  4. Step 4: Simplify right side
    11,940.30x = 164,434,050.41
  5. Step 5: Solve for x
    x = 164,434,050.41/11,940.30
  6. Step 6: Final answer
    x = 13,771.35

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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.