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Finding the Fourth Proportional to 11,147.78, 16,699.80 and 9,507.80

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Solution

The fourth proportional to 11,147.78, 16,699.80 and 9,507.80 is: 14,243.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,147.78 : 16,699.80 = 9,507.80 : x
  2. Step 2: Convert to fraction form
    11,147.78/16,699.80 = 9,507.80/x
  3. Step 3: Cross multiply
    11,147.78x = 16,699.80 × 9,507.80
  4. Step 4: Simplify right side
    11,147.78x = 158,778,358.44
  5. Step 5: Solve for x
    x = 158,778,358.44/11,147.78
  6. Step 6: Final answer
    x = 14,243.05

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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.