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Finding the Fourth Proportional to 20,237.92, 30,356.88 and 6,388

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Solution

The fourth proportional to 20,237.92, 30,356.88 and 6,388 is: 9,582

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,237.92 : 30,356.88 = 6,388 : x
  2. Step 2: Convert to fraction form
    20,237.92/30,356.88 = 6,388/x
  3. Step 3: Cross multiply
    20,237.92x = 30,356.88 × 6,388
  4. Step 4: Simplify right side
    20,237.92x = 193,919,749.44
  5. Step 5: Solve for x
    x = 193,919,749.44/20,237.92
  6. Step 6: Final answer
    x = 9,582

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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.