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Finding the Fourth Proportional to 28,371.39, 42,556.97 and 8,649.89

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Solution

The fourth proportional to 28,371.39, 42,556.97 and 8,649.89 is: 12,974.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,371.39 : 42,556.97 = 8,649.89 : x
  2. Step 2: Convert to fraction form
    28,371.39/42,556.97 = 8,649.89/x
  3. Step 3: Cross multiply
    28,371.39x = 42,556.97 × 8,649.89
  4. Step 4: Simplify right side
    28,371.39x = 368,113,053.33
  5. Step 5: Solve for x
    x = 368,113,053.33/28,371.39
  6. Step 6: Final answer
    x = 12,974.80

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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.