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Finding the Fourth Proportional to 28,474.27, 42,715.49 and 8,754.48

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Solution

The fourth proportional to 28,474.27, 42,715.49 and 8,754.48 is: 13,132.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,474.27 : 42,715.49 = 8,754.48 : x
  2. Step 2: Convert to fraction form
    28,474.27/42,715.49 = 8,754.48/x
  3. Step 3: Cross multiply
    28,474.27x = 42,715.49 × 8,754.48
  4. Step 4: Simplify right side
    28,474.27x = 373,951,859.12
  5. Step 5: Solve for x
    x = 373,951,859.12/28,474.27
  6. Step 6: Final answer
    x = 13,132.98

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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.