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Finding the Fourth Proportional to 19,212, 28,818 and 4,620

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Solution

The fourth proportional to 19,212, 28,818 and 4,620 is: 6,930

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,212 : 28,818 = 4,620 : x
  2. Step 2: Convert to fraction form
    19,212/28,818 = 4,620/x
  3. Step 3: Cross multiply
    19,212x = 28,818 × 4,620
  4. Step 4: Simplify right side
    19,212x = 133,139,160
  5. Step 5: Solve for x
    x = 133,139,160/19,212
  6. Step 6: Final answer
    x = 6,930

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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.