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Finding the Fourth Proportional to 7,918.79, 11,877.94 and 3,761.79

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Solution

The fourth proportional to 7,918.79, 11,877.94 and 3,761.79 is: 5,642.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,918.79 : 11,877.94 = 3,761.79 : x
  2. Step 2: Convert to fraction form
    7,918.79/11,877.94 = 3,761.79/x
  3. Step 3: Cross multiply
    7,918.79x = 11,877.94 × 3,761.79
  4. Step 4: Simplify right side
    7,918.79x = 44,682,315.91
  5. Step 5: Solve for x
    x = 44,682,315.91/7,918.79
  6. Step 6: Final answer
    x = 5,642.57

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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.