Home / 7,817.27-11,720.43-3,919.55

Finding the Fourth Proportional to 7,817.27, 11,720.43 and 3,919.55

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Solution

The fourth proportional to 7,817.27, 11,720.43 and 3,919.55 is: 5,876.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,817.27 : 11,720.43 = 3,919.55 : x
  2. Step 2: Convert to fraction form
    7,817.27/11,720.43 = 3,919.55/x
  3. Step 3: Cross multiply
    7,817.27x = 11,720.43 × 3,919.55
  4. Step 4: Simplify right side
    7,817.27x = 45,938,752.80
  5. Step 5: Solve for x
    x = 45,938,752.80/7,817.27
  6. Step 6: Final answer
    x = 5,876.58

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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.