Home / 13,868.73-20,811.29-5,109.80

Finding the Fourth Proportional to 13,868.73, 20,811.29 and 5,109.80

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Solution

The fourth proportional to 13,868.73, 20,811.29 and 5,109.80 is: 7,667.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,868.73 : 20,811.29 = 5,109.80 : x
  2. Step 2: Convert to fraction form
    13,868.73/20,811.29 = 5,109.80/x
  3. Step 3: Cross multiply
    13,868.73x = 20,811.29 × 5,109.80
  4. Step 4: Simplify right side
    13,868.73x = 106,341,400.04
  5. Step 5: Solve for x
    x = 106,341,400.04/13,868.73
  6. Step 6: Final answer
    x = 7,667.71

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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.