Home / 20,153.97-30,189.42-11,808.70

Finding the Fourth Proportional to 20,153.97, 30,189.42 and 11,808.70

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Solution

The fourth proportional to 20,153.97, 30,189.42 and 11,808.70 is: 17,688.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,153.97 : 30,189.42 = 11,808.70 : x
  2. Step 2: Convert to fraction form
    20,153.97/30,189.42 = 11,808.70/x
  3. Step 3: Cross multiply
    20,153.97x = 30,189.42 × 11,808.70
  4. Step 4: Simplify right side
    20,153.97x = 356,497,728.48
  5. Step 5: Solve for x
    x = 356,497,728.48/20,153.97
  6. Step 6: Final answer
    x = 17,688.71

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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.