Home / 7,719.31-11,578.20-2,172.53

Finding the Fourth Proportional to 7,719.31, 11,578.20 and 2,172.53

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Solution

The fourth proportional to 7,719.31, 11,578.20 and 2,172.53 is: 3,258.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,719.31 : 11,578.20 = 2,172.53 : x
  2. Step 2: Convert to fraction form
    7,719.31/11,578.20 = 2,172.53/x
  3. Step 3: Cross multiply
    7,719.31x = 11,578.20 × 2,172.53
  4. Step 4: Simplify right side
    7,719.31x = 25,153,942.52
  5. Step 5: Solve for x
    x = 25,153,942.52/7,719.31
  6. Step 6: Final answer
    x = 3,258.58

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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.