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Finding the Fourth Proportional to 7,872.91, 11,809.99 and 2,607.71

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Solution

The fourth proportional to 7,872.91, 11,809.99 and 2,607.71 is: 3,911.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,872.91 : 11,809.99 = 2,607.71 : x
  2. Step 2: Convert to fraction form
    7,872.91/11,809.99 = 2,607.71/x
  3. Step 3: Cross multiply
    7,872.91x = 11,809.99 × 2,607.71
  4. Step 4: Simplify right side
    7,872.91x = 30,797,047.00
  5. Step 5: Solve for x
    x = 30,797,047.00/7,872.91
  6. Step 6: Final answer
    x = 3,911.77

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1.5x scale

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.