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Finding the Fourth Proportional to 3,999.51, 5,989.98 and 3,861.09

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Solution

The fourth proportional to 3,999.51, 5,989.98 and 3,861.09 is: 5,782.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.51 : 5,989.98 = 3,861.09 : x
  2. Step 2: Convert to fraction form
    3,999.51/5,989.98 = 3,861.09/x
  3. Step 3: Cross multiply
    3,999.51x = 5,989.98 × 3,861.09
  4. Step 4: Simplify right side
    3,999.51x = 23,127,851.88
  5. Step 5: Solve for x
    x = 23,127,851.88/3,999.51
  6. Step 6: Final answer
    x = 5,782.67

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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.