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Finding the Fourth Proportional to 28,635.66, 42,949.98 and 8,913.78

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Solution

The fourth proportional to 28,635.66, 42,949.98 and 8,913.78 is: 13,369.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,635.66 : 42,949.98 = 8,913.78 : x
  2. Step 2: Convert to fraction form
    28,635.66/42,949.98 = 8,913.78/x
  3. Step 3: Cross multiply
    28,635.66x = 42,949.98 × 8,913.78
  4. Step 4: Simplify right side
    28,635.66x = 382,846,672.72
  5. Step 5: Solve for x
    x = 382,846,672.72/28,635.66
  6. Step 6: Final answer
    x = 13,369.58

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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.