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Finding the Fourth Proportional to 5,687.60, 8,521.80 and 3,738.80

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Solution

The fourth proportional to 5,687.60, 8,521.80 and 3,738.80 is: 5,601.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,687.60 : 8,521.80 = 3,738.80 : x
  2. Step 2: Convert to fraction form
    5,687.60/8,521.80 = 3,738.80/x
  3. Step 3: Cross multiply
    5,687.60x = 8,521.80 × 3,738.80
  4. Step 4: Simplify right side
    5,687.60x = 31,861,305.84
  5. Step 5: Solve for x
    x = 31,861,305.84/5,687.60
  6. Step 6: Final answer
    x = 5,601.89

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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.