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Finding the Fourth Proportional to 28,355, 42,518.20 and 16,512.60

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Solution

The fourth proportional to 28,355, 42,518.20 and 16,512.60 is: 24,760.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,355 : 42,518.20 = 16,512.60 : x
  2. Step 2: Convert to fraction form
    28,355/42,518.20 = 16,512.60/x
  3. Step 3: Cross multiply
    28,355x = 42,518.20 × 16,512.60
  4. Step 4: Simplify right side
    28,355x = 702,086,029.32
  5. Step 5: Solve for x
    x = 702,086,029.32/28,355
  6. Step 6: Final answer
    x = 24,760.57

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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.