Home / 20,109.20-30,178.20-11,334.80

Finding the Fourth Proportional to 20,109.20, 30,178.20 and 11,334.80

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Solution

The fourth proportional to 20,109.20, 30,178.20 and 11,334.80 is: 17,010.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,109.20 : 30,178.20 = 11,334.80 : x
  2. Step 2: Convert to fraction form
    20,109.20/30,178.20 = 11,334.80/x
  3. Step 3: Cross multiply
    20,109.20x = 30,178.20 × 11,334.80
  4. Step 4: Simplify right side
    20,109.20x = 342,063,861.36
  5. Step 5: Solve for x
    x = 342,063,861.36/20,109.20
  6. Step 6: Final answer
    x = 17,010.32

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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.