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Finding the Fourth Proportional to 54,818.81, 82,221.39 and 15,379

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Solution

The fourth proportional to 54,818.81, 82,221.39 and 15,379 is: 23,066.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,818.81 : 82,221.39 = 15,379 : x
  2. Step 2: Convert to fraction form
    54,818.81/82,221.39 = 15,379/x
  3. Step 3: Cross multiply
    54,818.81x = 82,221.39 × 15,379
  4. Step 4: Simplify right side
    54,818.81x = 1,264,482,756.81
  5. Step 5: Solve for x
    x = 1,264,482,756.81/54,818.81
  6. Step 6: Final answer
    x = 23,066.59

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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.