Home / 12,210.80-18,318.94-3,891.29

Finding the Fourth Proportional to 12,210.80, 18,318.94 and 3,891.29

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Solution

The fourth proportional to 12,210.80, 18,318.94 and 3,891.29 is: 5,837.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,210.80 : 18,318.94 = 3,891.29 : x
  2. Step 2: Convert to fraction form
    12,210.80/18,318.94 = 3,891.29/x
  3. Step 3: Cross multiply
    12,210.80x = 18,318.94 × 3,891.29
  4. Step 4: Simplify right side
    12,210.80x = 71,284,206.71
  5. Step 5: Solve for x
    x = 71,284,206.71/12,210.80
  6. Step 6: Final answer
    x = 5,837.80

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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.