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Finding the Fourth Proportional to 20,139.99, 30,213.06 and 10,273.88

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Solution

The fourth proportional to 20,139.99, 30,213.06 and 10,273.88 is: 15,412.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.99 : 30,213.06 = 10,273.88 : x
  2. Step 2: Convert to fraction form
    20,139.99/30,213.06 = 10,273.88/x
  3. Step 3: Cross multiply
    20,139.99x = 30,213.06 × 10,273.88
  4. Step 4: Simplify right side
    20,139.99x = 310,405,446.53
  5. Step 5: Solve for x
    x = 310,405,446.53/20,139.99
  6. Step 6: Final answer
    x = 15,412.39

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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.