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Finding the Fourth Proportional to 13,980.96, 21,000.60 and 11,793.96

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Solution

The fourth proportional to 13,980.96, 21,000.60 and 11,793.96 is: 17,715.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,980.96 : 21,000.60 = 11,793.96 : x
  2. Step 2: Convert to fraction form
    13,980.96/21,000.60 = 11,793.96/x
  3. Step 3: Cross multiply
    13,980.96x = 21,000.60 × 11,793.96
  4. Step 4: Simplify right side
    13,980.96x = 247,680,236.38
  5. Step 5: Solve for x
    x = 247,680,236.38/13,980.96
  6. Step 6: Final answer
    x = 17,715.54

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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.