Home / 13,998.26-20,991.20-7,422.96

Finding the Fourth Proportional to 13,998.26, 20,991.20 and 7,422.96

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Solution

The fourth proportional to 13,998.26, 20,991.20 and 7,422.96 is: 11,131.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,998.26 : 20,991.20 = 7,422.96 : x
  2. Step 2: Convert to fraction form
    13,998.26/20,991.20 = 7,422.96/x
  3. Step 3: Cross multiply
    13,998.26x = 20,991.20 × 7,422.96
  4. Step 4: Simplify right side
    13,998.26x = 155,816,837.95
  5. Step 5: Solve for x
    x = 155,816,837.95/13,998.26
  6. Step 6: Final answer
    x = 11,131.16

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1.5x scale

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.