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Finding the Fourth Proportional to 13,978, 20,914.66 and 8,335.04

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Solution

The fourth proportional to 13,978, 20,914.66 and 8,335.04 is: 12,471.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,978 : 20,914.66 = 8,335.04 : x
  2. Step 2: Convert to fraction form
    13,978/20,914.66 = 8,335.04/x
  3. Step 3: Cross multiply
    13,978x = 20,914.66 × 8,335.04
  4. Step 4: Simplify right side
    13,978x = 174,324,527.69
  5. Step 5: Solve for x
    x = 174,324,527.69/13,978
  6. Step 6: Final answer
    x = 12,471.35

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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.