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Finding the Fourth Proportional to 13,392.56, 20,082 and 7,847.68

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Solution

The fourth proportional to 13,392.56, 20,082 and 7,847.68 is: 11,767.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,392.56 : 20,082 = 7,847.68 : x
  2. Step 2: Convert to fraction form
    13,392.56/20,082 = 7,847.68/x
  3. Step 3: Cross multiply
    13,392.56x = 20,082 × 7,847.68
  4. Step 4: Simplify right side
    13,392.56x = 157,597,109.76
  5. Step 5: Solve for x
    x = 157,597,109.76/13,392.56
  6. Step 6: Final answer
    x = 11,767.51

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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.