Home / 13,680.29-20,551.42-11,811.93

Finding the Fourth Proportional to 13,680.29, 20,551.42 and 11,811.93

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Solution

The fourth proportional to 13,680.29, 20,551.42 and 11,811.93 is: 17,744.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,680.29 : 20,551.42 = 11,811.93 : x
  2. Step 2: Convert to fraction form
    13,680.29/20,551.42 = 11,811.93/x
  3. Step 3: Cross multiply
    13,680.29x = 20,551.42 × 11,811.93
  4. Step 4: Simplify right side
    13,680.29x = 242,751,872.14
  5. Step 5: Solve for x
    x = 242,751,872.14/13,680.29
  6. Step 6: Final answer
    x = 17,744.64

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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.