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Finding the Fourth Proportional to 7,991.98, 12,005.25 and 6,761.86

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Solution

The fourth proportional to 7,991.98, 12,005.25 and 6,761.86 is: 10,157.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,991.98 : 12,005.25 = 6,761.86 : x
  2. Step 2: Convert to fraction form
    7,991.98/12,005.25 = 6,761.86/x
  3. Step 3: Cross multiply
    7,991.98x = 12,005.25 × 6,761.86
  4. Step 4: Simplify right side
    7,991.98x = 81,177,819.77
  5. Step 5: Solve for x
    x = 81,177,819.77/7,991.98
  6. Step 6: Final answer
    x = 10,157.41

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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.