Home / 7,985.43-11,961.81-3,812.72

Finding the Fourth Proportional to 7,985.43, 11,961.81 and 3,812.72

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Solution

The fourth proportional to 7,985.43, 11,961.81 and 3,812.72 is: 5,711.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,985.43 : 11,961.81 = 3,812.72 : x
  2. Step 2: Convert to fraction form
    7,985.43/11,961.81 = 3,812.72/x
  3. Step 3: Cross multiply
    7,985.43x = 11,961.81 × 3,812.72
  4. Step 4: Simplify right side
    7,985.43x = 45,606,972.41
  5. Step 5: Solve for x
    x = 45,606,972.41/7,985.43
  6. Step 6: Final answer
    x = 5,711.27

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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.