Home / 13,399.92-18,449.82-11,379.12

Finding the Fourth Proportional to 13,399.92, 18,449.82 and 11,379.12

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Solution

The fourth proportional to 13,399.92, 18,449.82 and 11,379.12 is: 15,667.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,399.92 : 18,449.82 = 11,379.12 : x
  2. Step 2: Convert to fraction form
    13,399.92/18,449.82 = 11,379.12/x
  3. Step 3: Cross multiply
    13,399.92x = 18,449.82 × 11,379.12
  4. Step 4: Simplify right side
    13,399.92x = 209,942,715.76
  5. Step 5: Solve for x
    x = 209,942,715.76/13,399.92
  6. Step 6: Final answer
    x = 15,667.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.