Home / 7,688.67-11,531.16-2,142.20

Finding the Fourth Proportional to 7,688.67, 11,531.16 and 2,142.20

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Solution

The fourth proportional to 7,688.67, 11,531.16 and 2,142.20 is: 3,212.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,688.67 : 11,531.16 = 2,142.20 : x
  2. Step 2: Convert to fraction form
    7,688.67/11,531.16 = 2,142.20/x
  3. Step 3: Cross multiply
    7,688.67x = 11,531.16 × 2,142.20
  4. Step 4: Simplify right side
    7,688.67x = 24,701,993.30
  5. Step 5: Solve for x
    x = 24,701,993.30/7,688.67
  6. Step 6: Final answer
    x = 3,212.78

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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.