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Finding the Fourth Proportional to 11,850.56, 17,775.80 and 11,128.88

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Solution

The fourth proportional to 11,850.56, 17,775.80 and 11,128.88 is: 16,693.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,850.56 : 17,775.80 = 11,128.88 : x
  2. Step 2: Convert to fraction form
    11,850.56/17,775.80 = 11,128.88/x
  3. Step 3: Cross multiply
    11,850.56x = 17,775.80 × 11,128.88
  4. Step 4: Simplify right side
    11,850.56x = 197,824,745.10
  5. Step 5: Solve for x
    x = 197,824,745.10/11,850.56
  6. Step 6: Final answer
    x = 16,693.28

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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.