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Finding the Fourth Proportional to 11,992.86, 17,989.34 and 3,672.85

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Solution

The fourth proportional to 11,992.86, 17,989.34 and 3,672.85 is: 5,509.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,992.86 : 17,989.34 = 3,672.85 : x
  2. Step 2: Convert to fraction form
    11,992.86/17,989.34 = 3,672.85/x
  3. Step 3: Cross multiply
    11,992.86x = 17,989.34 × 3,672.85
  4. Step 4: Simplify right side
    11,992.86x = 66,072,111.63
  5. Step 5: Solve for x
    x = 66,072,111.63/11,992.86
  6. Step 6: Final answer
    x = 5,509.29

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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.