Home / 7,620.58-11,431.80-2,689.21

Finding the Fourth Proportional to 7,620.58, 11,431.80 and 2,689.21

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Solution

The fourth proportional to 7,620.58, 11,431.80 and 2,689.21 is: 4,034.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,620.58 : 11,431.80 = 2,689.21 : x
  2. Step 2: Convert to fraction form
    7,620.58/11,431.80 = 2,689.21/x
  3. Step 3: Cross multiply
    7,620.58x = 11,431.80 × 2,689.21
  4. Step 4: Simplify right side
    7,620.58x = 30,742,497.43
  5. Step 5: Solve for x
    x = 30,742,497.43/7,620.58
  6. Step 6: Final answer
    x = 4,034.14

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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.