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Finding the Fourth Proportional to 8,571.89, 11,835.34 and 6,685.58

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Solution

The fourth proportional to 8,571.89, 11,835.34 and 6,685.58 is: 9,230.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,571.89 : 11,835.34 = 6,685.58 : x
  2. Step 2: Convert to fraction form
    8,571.89/11,835.34 = 6,685.58/x
  3. Step 3: Cross multiply
    8,571.89x = 11,835.34 × 6,685.58
  4. Step 4: Simplify right side
    8,571.89x = 79,126,112.40
  5. Step 5: Solve for x
    x = 79,126,112.40/8,571.89
  6. Step 6: Final answer
    x = 9,230.88

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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.