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Finding the Fourth Proportional to 7,872.84, 11,809.46 and 2,607.84

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Solution

The fourth proportional to 7,872.84, 11,809.46 and 2,607.84 is: 3,911.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,872.84 : 11,809.46 = 2,607.84 : x
  2. Step 2: Convert to fraction form
    7,872.84/11,809.46 = 2,607.84/x
  3. Step 3: Cross multiply
    7,872.84x = 11,809.46 × 2,607.84
  4. Step 4: Simplify right side
    7,872.84x = 30,797,182.17
  5. Step 5: Solve for x
    x = 30,797,182.17/7,872.84
  6. Step 6: Final answer
    x = 3,911.83

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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.