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Finding the Fourth Proportional to 5,382.65, 8,075.19 and 1,872.82

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Solution

The fourth proportional to 5,382.65, 8,075.19 and 1,872.82 is: 2,809.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,382.65 : 8,075.19 = 1,872.82 : x
  2. Step 2: Convert to fraction form
    5,382.65/8,075.19 = 1,872.82/x
  3. Step 3: Cross multiply
    5,382.65x = 8,075.19 × 1,872.82
  4. Step 4: Simplify right side
    5,382.65x = 15,123,394.45
  5. Step 5: Solve for x
    x = 15,123,394.45/5,382.65
  6. Step 6: Final answer
    x = 2,809.65

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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.