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Finding the Fourth Proportional to 8,781.86, 13,174.95 and 6,189.86

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Solution

The fourth proportional to 8,781.86, 13,174.95 and 6,189.86 is: 9,286.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,781.86 : 13,174.95 = 6,189.86 : x
  2. Step 2: Convert to fraction form
    8,781.86/13,174.95 = 6,189.86/x
  3. Step 3: Cross multiply
    8,781.86x = 13,174.95 × 6,189.86
  4. Step 4: Simplify right side
    8,781.86x = 81,551,096.01
  5. Step 5: Solve for x
    x = 81,551,096.01/8,781.86
  6. Step 6: Final answer
    x = 9,286.31

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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.