Home / 13,383.56-20,081.12-7,141.80

Finding the Fourth Proportional to 13,383.56, 20,081.12 and 7,141.80

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Solution

The fourth proportional to 13,383.56, 20,081.12 and 7,141.80 is: 10,715.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,383.56 : 20,081.12 = 7,141.80 : x
  2. Step 2: Convert to fraction form
    13,383.56/20,081.12 = 7,141.80/x
  3. Step 3: Cross multiply
    13,383.56x = 20,081.12 × 7,141.80
  4. Step 4: Simplify right side
    13,383.56x = 143,415,382.41
  5. Step 5: Solve for x
    x = 143,415,382.41/13,383.56
  6. Step 6: Final answer
    x = 10,715.79

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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.