Home / 7,620.65-11,431.89-2,689.28

Finding the Fourth Proportional to 7,620.65, 11,431.89 and 2,689.28

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Solution

The fourth proportional to 7,620.65, 11,431.89 and 2,689.28 is: 4,034.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,620.65 : 11,431.89 = 2,689.28 : x
  2. Step 2: Convert to fraction form
    7,620.65/11,431.89 = 2,689.28/x
  3. Step 3: Cross multiply
    7,620.65x = 11,431.89 × 2,689.28
  4. Step 4: Simplify right side
    7,620.65x = 30,743,482.53
  5. Step 5: Solve for x
    x = 30,743,482.53/7,620.65
  6. Step 6: Final answer
    x = 4,034.24

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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.