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Finding the Fourth Proportional to 19,212, 28,818.24 and 6,900

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Solution

The fourth proportional to 19,212, 28,818.24 and 6,900 is: 10,350.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,212 : 28,818.24 = 6,900 : x
  2. Step 2: Convert to fraction form
    19,212/28,818.24 = 6,900/x
  3. Step 3: Cross multiply
    19,212x = 28,818.24 × 6,900
  4. Step 4: Simplify right side
    19,212x = 198,845,856
  5. Step 5: Solve for x
    x = 198,845,856/19,212
  6. Step 6: Final answer
    x = 10,350.09

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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.