Home / 13,781.44-20,674.32-5,457.28

Finding the Fourth Proportional to 13,781.44, 20,674.32 and 5,457.28

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Solution

The fourth proportional to 13,781.44, 20,674.32 and 5,457.28 is: 8,186.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,781.44 : 20,674.32 = 5,457.28 : x
  2. Step 2: Convert to fraction form
    13,781.44/20,674.32 = 5,457.28/x
  3. Step 3: Cross multiply
    13,781.44x = 20,674.32 × 5,457.28
  4. Step 4: Simplify right side
    13,781.44x = 112,825,553.05
  5. Step 5: Solve for x
    x = 112,825,553.05/13,781.44
  6. Step 6: Final answer
    x = 8,186.78

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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.