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Finding the Fourth Proportional to 5,687.96, 8,520.87 and 3,215.30

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Solution

The fourth proportional to 5,687.96, 8,520.87 and 3,215.30 is: 4,816.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,687.96 : 8,520.87 = 3,215.30 : x
  2. Step 2: Convert to fraction form
    5,687.96/8,520.87 = 3,215.30/x
  3. Step 3: Cross multiply
    5,687.96x = 8,520.87 × 3,215.30
  4. Step 4: Simplify right side
    5,687.96x = 27,397,153.31
  5. Step 5: Solve for x
    x = 27,397,153.31/5,687.96
  6. Step 6: Final answer
    x = 4,816.69

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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.