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Finding the Fourth Proportional to 7,991.03, 11,990.60 and 5,388.50

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Solution

The fourth proportional to 7,991.03, 11,990.60 and 5,388.50 is: 8,085.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,991.03 : 11,990.60 = 5,388.50 : x
  2. Step 2: Convert to fraction form
    7,991.03/11,990.60 = 5,388.50/x
  3. Step 3: Cross multiply
    7,991.03x = 11,990.60 × 5,388.50
  4. Step 4: Simplify right side
    7,991.03x = 64,611,321.16
  5. Step 5: Solve for x
    x = 64,611,321.16/7,991.03
  6. Step 6: Final answer
    x = 8,085.48

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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.