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Finding the Fourth Proportional to 20,220, 30,330 and 5,628

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Solution

The fourth proportional to 20,220, 30,330 and 5,628 is: 8,442

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,220 : 30,330 = 5,628 : x
  2. Step 2: Convert to fraction form
    20,220/30,330 = 5,628/x
  3. Step 3: Cross multiply
    20,220x = 30,330 × 5,628
  4. Step 4: Simplify right side
    20,220x = 170,697,240
  5. Step 5: Solve for x
    x = 170,697,240/20,220
  6. Step 6: Final answer
    x = 8,442

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.