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Finding the Fourth Proportional to 13,958.10, 20,912.55 and 7,369.77

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Solution

The fourth proportional to 13,958.10, 20,912.55 and 7,369.77 is: 11,041.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,958.10 : 20,912.55 = 7,369.77 : x
  2. Step 2: Convert to fraction form
    13,958.10/20,912.55 = 7,369.77/x
  3. Step 3: Cross multiply
    13,958.10x = 20,912.55 × 7,369.77
  4. Step 4: Simplify right side
    13,958.10x = 154,120,683.61
  5. Step 5: Solve for x
    x = 154,120,683.61/13,958.10
  6. Step 6: Final answer
    x = 11,041.67

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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.