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Finding the Fourth Proportional to 27,129.70, 40,694.55 and 15,465.70

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Solution

The fourth proportional to 27,129.70, 40,694.55 and 15,465.70 is: 23,198.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,129.70 : 40,694.55 = 15,465.70 : x
  2. Step 2: Convert to fraction form
    27,129.70/40,694.55 = 15,465.70/x
  3. Step 3: Cross multiply
    27,129.70x = 40,694.55 × 15,465.70
  4. Step 4: Simplify right side
    27,129.70x = 629,369,701.94
  5. Step 5: Solve for x
    x = 629,369,701.94/27,129.70
  6. Step 6: Final answer
    x = 23,198.55

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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.