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Finding the Fourth Proportional to 28,379.78, 42,566.12 and 11,737.72

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Solution

The fourth proportional to 28,379.78, 42,566.12 and 11,737.72 is: 17,605.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,379.78 : 42,566.12 = 11,737.72 : x
  2. Step 2: Convert to fraction form
    28,379.78/42,566.12 = 11,737.72/x
  3. Step 3: Cross multiply
    28,379.78x = 42,566.12 × 11,737.72
  4. Step 4: Simplify right side
    28,379.78x = 499,629,198.05
  5. Step 5: Solve for x
    x = 499,629,198.05/28,379.78
  6. Step 6: Final answer
    x = 17,605.11

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1.5x scale

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.