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Finding the Fourth Proportional to 28,610.43, 42,918.49 and 10,603.49

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Solution

The fourth proportional to 28,610.43, 42,918.49 and 10,603.49 is: 15,906.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,610.43 : 42,918.49 = 10,603.49 : x
  2. Step 2: Convert to fraction form
    28,610.43/42,918.49 = 10,603.49/x
  3. Step 3: Cross multiply
    28,610.43x = 42,918.49 × 10,603.49
  4. Step 4: Simplify right side
    28,610.43x = 455,085,819.61
  5. Step 5: Solve for x
    x = 455,085,819.61/28,610.43
  6. Step 6: Final answer
    x = 15,906.29

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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.