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Finding the Fourth Proportional to 11,163.78, 15,409.62 and 8,029.08

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Solution

The fourth proportional to 11,163.78, 15,409.62 and 8,029.08 is: 11,082.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,163.78 : 15,409.62 = 8,029.08 : x
  2. Step 2: Convert to fraction form
    11,163.78/15,409.62 = 8,029.08/x
  3. Step 3: Cross multiply
    11,163.78x = 15,409.62 × 8,029.08
  4. Step 4: Simplify right side
    11,163.78x = 123,725,071.75
  5. Step 5: Solve for x
    x = 123,725,071.75/11,163.78
  6. Step 6: Final answer
    x = 11,082.72

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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.