Home / 54,186.27-81,286.32-20,915.85

Finding the Fourth Proportional to 54,186.27, 81,286.32 and 20,915.85

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Solution

The fourth proportional to 54,186.27, 81,286.32 and 20,915.85 is: 31,376.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,186.27 : 81,286.32 = 20,915.85 : x
  2. Step 2: Convert to fraction form
    54,186.27/81,286.32 = 20,915.85/x
  3. Step 3: Cross multiply
    54,186.27x = 81,286.32 × 20,915.85
  4. Step 4: Simplify right side
    54,186.27x = 1,700,172,476.17
  5. Step 5: Solve for x
    x = 1,700,172,476.17/54,186.27
  6. Step 6: Final answer
    x = 31,376.44

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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.