Home / 13,961.76-20,949.81-7,720.62

Finding the Fourth Proportional to 13,961.76, 20,949.81 and 7,720.62

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Solution

The fourth proportional to 13,961.76, 20,949.81 and 7,720.62 is: 11,584.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,961.76 : 20,949.81 = 7,720.62 : x
  2. Step 2: Convert to fraction form
    13,961.76/20,949.81 = 7,720.62/x
  3. Step 3: Cross multiply
    13,961.76x = 20,949.81 × 7,720.62
  4. Step 4: Simplify right side
    13,961.76x = 161,745,522.08
  5. Step 5: Solve for x
    x = 161,745,522.08/13,961.76
  6. Step 6: Final answer
    x = 11,584.89

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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.