Home / 7,781.72-11,672.53-3,619.42

Finding the Fourth Proportional to 7,781.72, 11,672.53 and 3,619.42

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Solution

The fourth proportional to 7,781.72, 11,672.53 and 3,619.42 is: 5,429.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,781.72 : 11,672.53 = 3,619.42 : x
  2. Step 2: Convert to fraction form
    7,781.72/11,672.53 = 3,619.42/x
  3. Step 3: Cross multiply
    7,781.72x = 11,672.53 × 3,619.42
  4. Step 4: Simplify right side
    7,781.72x = 42,247,788.53
  5. Step 5: Solve for x
    x = 42,247,788.53/7,781.72
  6. Step 6: Final answer
    x = 5,429.11

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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.