Home / 8,678.66-13,015.30-3,131.29

Finding the Fourth Proportional to 8,678.66, 13,015.30 and 3,131.29

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Solution

The fourth proportional to 8,678.66, 13,015.30 and 3,131.29 is: 4,695.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,678.66 : 13,015.30 = 3,131.29 : x
  2. Step 2: Convert to fraction form
    8,678.66/13,015.30 = 3,131.29/x
  3. Step 3: Cross multiply
    8,678.66x = 13,015.30 × 3,131.29
  4. Step 4: Simplify right side
    8,678.66x = 40,754,613.66
  5. Step 5: Solve for x
    x = 40,754,613.66/8,678.66
  6. Step 6: Final answer
    x = 4,695.96

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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.