Home / 8,719.28-13,084.49-3,172.09

Finding the Fourth Proportional to 8,719.28, 13,084.49 and 3,172.09

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Solution

The fourth proportional to 8,719.28, 13,084.49 and 3,172.09 is: 4,760.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,719.28 : 13,084.49 = 3,172.09 : x
  2. Step 2: Convert to fraction form
    8,719.28/13,084.49 = 3,172.09/x
  3. Step 3: Cross multiply
    8,719.28x = 13,084.49 × 3,172.09
  4. Step 4: Simplify right side
    8,719.28x = 41,505,131.31
  5. Step 5: Solve for x
    x = 41,505,131.31/8,719.28
  6. Step 6: Final answer
    x = 4,760.16

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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.