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Finding the Fourth Proportional to 28,343.82, 42,503.43 and 8,617.76

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Solution

The fourth proportional to 28,343.82, 42,503.43 and 8,617.76 is: 12,922.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,343.82 : 42,503.43 = 8,617.76 : x
  2. Step 2: Convert to fraction form
    28,343.82/42,503.43 = 8,617.76/x
  3. Step 3: Cross multiply
    28,343.82x = 42,503.43 × 8,617.76
  4. Step 4: Simplify right side
    28,343.82x = 366,284,338.10
  5. Step 5: Solve for x
    x = 366,284,338.10/28,343.82
  6. Step 6: Final answer
    x = 12,922.90

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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.