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Finding the Fourth Proportional to 8,989.54, 13,493.90 and 7,956.12

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Solution

The fourth proportional to 8,989.54, 13,493.90 and 7,956.12 is: 11,942.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,989.54 : 13,493.90 = 7,956.12 : x
  2. Step 2: Convert to fraction form
    8,989.54/13,493.90 = 7,956.12/x
  3. Step 3: Cross multiply
    8,989.54x = 13,493.90 × 7,956.12
  4. Step 4: Simplify right side
    8,989.54x = 107,359,087.67
  5. Step 5: Solve for x
    x = 107,359,087.67/8,989.54
  6. Step 6: Final answer
    x = 11,942.67

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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.