Home / 13,400.12-18,450.07-11,379.29

Finding the Fourth Proportional to 13,400.12, 18,450.07 and 11,379.29

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Solution

The fourth proportional to 13,400.12, 18,450.07 and 11,379.29 is: 15,667.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,400.12 : 18,450.07 = 11,379.29 : x
  2. Step 2: Convert to fraction form
    13,400.12/18,450.07 = 11,379.29/x
  3. Step 3: Cross multiply
    13,400.12x = 18,450.07 × 11,379.29
  4. Step 4: Simplify right side
    13,400.12x = 209,948,576.35
  5. Step 5: Solve for x
    x = 209,948,576.35/13,400.12
  6. Step 6: Final answer
    x = 15,667.66

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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.