Home / 8,678.91-13,015.67-3,131.53

Finding the Fourth Proportional to 8,678.91, 13,015.67 and 3,131.53

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Solution

The fourth proportional to 8,678.91, 13,015.67 and 3,131.53 is: 4,696.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,678.91 : 13,015.67 = 3,131.53 : x
  2. Step 2: Convert to fraction form
    8,678.91/13,015.67 = 3,131.53/x
  3. Step 3: Cross multiply
    8,678.91x = 13,015.67 × 3,131.53
  4. Step 4: Simplify right side
    8,678.91x = 40,758,912.88
  5. Step 5: Solve for x
    x = 40,758,912.88/8,678.91
  6. Step 6: Final answer
    x = 4,696.32

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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.