Home / 13,975.72-20,961.96-5,209.68

Finding the Fourth Proportional to 13,975.72, 20,961.96 and 5,209.68

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Solution

The fourth proportional to 13,975.72, 20,961.96 and 5,209.68 is: 7,813.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,975.72 : 20,961.96 = 5,209.68 : x
  2. Step 2: Convert to fraction form
    13,975.72/20,961.96 = 5,209.68/x
  3. Step 3: Cross multiply
    13,975.72x = 20,961.96 × 5,209.68
  4. Step 4: Simplify right side
    13,975.72x = 109,205,103.77
  5. Step 5: Solve for x
    x = 109,205,103.77/13,975.72
  6. Step 6: Final answer
    x = 7,813.92

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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.