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Finding the Fourth Proportional to 11,889.72, 17,850.84 and 7,661.52

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Solution

The fourth proportional to 11,889.72, 17,850.84 and 7,661.52 is: 11,502.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,889.72 : 17,850.84 = 7,661.52 : x
  2. Step 2: Convert to fraction form
    11,889.72/17,850.84 = 7,661.52/x
  3. Step 3: Cross multiply
    11,889.72x = 17,850.84 × 7,661.52
  4. Step 4: Simplify right side
    11,889.72x = 136,764,567.68
  5. Step 5: Solve for x
    x = 136,764,567.68/11,889.72
  6. Step 6: Final answer
    x = 11,502.76

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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.