Home / 13,716.80-20,531.36-7,133.92

Finding the Fourth Proportional to 13,716.80, 20,531.36 and 7,133.92

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Solution

The fourth proportional to 13,716.80, 20,531.36 and 7,133.92 is: 10,678.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,716.80 : 20,531.36 = 7,133.92 : x
  2. Step 2: Convert to fraction form
    13,716.80/20,531.36 = 7,133.92/x
  3. Step 3: Cross multiply
    13,716.80x = 20,531.36 × 7,133.92
  4. Step 4: Simplify right side
    13,716.80x = 146,469,079.73
  5. Step 5: Solve for x
    x = 146,469,079.73/13,716.80
  6. Step 6: Final answer
    x = 10,678.08

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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.