Home / 20,179.36-30,230.88-11,420.56

Finding the Fourth Proportional to 20,179.36, 30,230.88 and 11,420.56

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Solution

The fourth proportional to 20,179.36, 30,230.88 and 11,420.56 is: 17,109.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,179.36 : 30,230.88 = 11,420.56 : x
  2. Step 2: Convert to fraction form
    20,179.36/30,230.88 = 11,420.56/x
  3. Step 3: Cross multiply
    20,179.36x = 30,230.88 × 11,420.56
  4. Step 4: Simplify right side
    20,179.36x = 345,253,578.89
  5. Step 5: Solve for x
    x = 345,253,578.89/20,179.36
  6. Step 6: Final answer
    x = 17,109.24

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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.