Home / 20,128.13-30,008.46-19,616.60

Finding the Fourth Proportional to 20,128.13, 30,008.46 and 19,616.60

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Solution

The fourth proportional to 20,128.13, 30,008.46 and 19,616.60 is: 29,245.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.13 : 30,008.46 = 19,616.60 : x
  2. Step 2: Convert to fraction form
    20,128.13/30,008.46 = 19,616.60/x
  3. Step 3: Cross multiply
    20,128.13x = 30,008.46 × 19,616.60
  4. Step 4: Simplify right side
    20,128.13x = 588,663,858.35
  5. Step 5: Solve for x
    x = 588,663,858.35/20,128.13
  6. Step 6: Final answer
    x = 29,245.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.