Home / 13,844.80-20,744.40-7,991.20

Finding the Fourth Proportional to 13,844.80, 20,744.40 and 7,991.20

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Solution

The fourth proportional to 13,844.80, 20,744.40 and 7,991.20 is: 11,973.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,844.80 : 20,744.40 = 7,991.20 : x
  2. Step 2: Convert to fraction form
    13,844.80/20,744.40 = 7,991.20/x
  3. Step 3: Cross multiply
    13,844.80x = 20,744.40 × 7,991.20
  4. Step 4: Simplify right side
    13,844.80x = 165,772,649.28
  5. Step 5: Solve for x
    x = 165,772,649.28/13,844.80
  6. Step 6: Final answer
    x = 11,973.64

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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.