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Finding the Fourth Proportional to 28,169.78, 42,250.41 and 9,446.63

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Solution

The fourth proportional to 28,169.78, 42,250.41 and 9,446.63 is: 14,168.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,169.78 : 42,250.41 = 9,446.63 : x
  2. Step 2: Convert to fraction form
    28,169.78/42,250.41 = 9,446.63/x
  3. Step 3: Cross multiply
    28,169.78x = 42,250.41 × 9,446.63
  4. Step 4: Simplify right side
    28,169.78x = 399,123,779.37
  5. Step 5: Solve for x
    x = 399,123,779.37/28,169.78
  6. Step 6: Final answer
    x = 14,168.51

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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.