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Finding the Fourth Proportional to 20,144.67, 30,069.13 and 18,660.24

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Solution

The fourth proportional to 20,144.67, 30,069.13 and 18,660.24 is: 27,853.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,144.67 : 30,069.13 = 18,660.24 : x
  2. Step 2: Convert to fraction form
    20,144.67/30,069.13 = 18,660.24/x
  3. Step 3: Cross multiply
    20,144.67x = 30,069.13 × 18,660.24
  4. Step 4: Simplify right side
    20,144.67x = 561,097,182.39
  5. Step 5: Solve for x
    x = 561,097,182.39/20,144.67
  6. Step 6: Final answer
    x = 27,853.38

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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.