Home / 8,687.36-13,020.78-3,137.78

Finding the Fourth Proportional to 8,687.36, 13,020.78 and 3,137.78

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Solution

The fourth proportional to 8,687.36, 13,020.78 and 3,137.78 is: 4,702.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,687.36 : 13,020.78 = 3,137.78 : x
  2. Step 2: Convert to fraction form
    8,687.36/13,020.78 = 3,137.78/x
  3. Step 3: Cross multiply
    8,687.36x = 13,020.78 × 3,137.78
  4. Step 4: Simplify right side
    8,687.36x = 40,856,343.07
  5. Step 5: Solve for x
    x = 40,856,343.07/8,687.36
  6. Step 6: Final answer
    x = 4,702.96

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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.