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Finding the Fourth Proportional to 20,392.88, 30,571.20 and 7,243.52

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Solution

The fourth proportional to 20,392.88, 30,571.20 and 7,243.52 is: 10,858.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,392.88 : 30,571.20 = 7,243.52 : x
  2. Step 2: Convert to fraction form
    20,392.88/30,571.20 = 7,243.52/x
  3. Step 3: Cross multiply
    20,392.88x = 30,571.20 × 7,243.52
  4. Step 4: Simplify right side
    20,392.88x = 221,443,098.62
  5. Step 5: Solve for x
    x = 221,443,098.62/20,392.88
  6. Step 6: Final answer
    x = 10,858.84

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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.