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Finding the Fourth Proportional to 20,239.88, 30,364.67 and 6,388.88

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Solution

The fourth proportional to 20,239.88, 30,364.67 and 6,388.88 is: 9,584.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,239.88 : 30,364.67 = 6,388.88 : x
  2. Step 2: Convert to fraction form
    20,239.88/30,364.67 = 6,388.88/x
  3. Step 3: Cross multiply
    20,239.88x = 30,364.67 × 6,388.88
  4. Step 4: Simplify right side
    20,239.88x = 193,996,097.02
  5. Step 5: Solve for x
    x = 193,996,097.02/20,239.88
  6. Step 6: Final answer
    x = 9,584.85

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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.