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Finding the Fourth Proportional to 11,725, 16,180.50 and 6,419.86

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Solution

The fourth proportional to 11,725, 16,180.50 and 6,419.86 is: 8,859.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,725 : 16,180.50 = 6,419.86 : x
  2. Step 2: Convert to fraction form
    11,725/16,180.50 = 6,419.86/x
  3. Step 3: Cross multiply
    11,725x = 16,180.50 × 6,419.86
  4. Step 4: Simplify right side
    11,725x = 103,876,544.73
  5. Step 5: Solve for x
    x = 103,876,544.73/11,725
  6. Step 6: Final answer
    x = 8,859.41

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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.