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Finding the Fourth Proportional to 8,920.03, 13,383.15 and 3,990.19

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Solution

The fourth proportional to 8,920.03, 13,383.15 and 3,990.19 is: 5,986.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.03 : 13,383.15 = 3,990.19 : x
  2. Step 2: Convert to fraction form
    8,920.03/13,383.15 = 3,990.19/x
  3. Step 3: Cross multiply
    8,920.03x = 13,383.15 × 3,990.19
  4. Step 4: Simplify right side
    8,920.03x = 53,401,311.30
  5. Step 5: Solve for x
    x = 53,401,311.30/8,920.03
  6. Step 6: Final answer
    x = 5,986.67

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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.