Home / 12,140.88-18,212.63-3,821.15

Finding the Fourth Proportional to 12,140.88, 18,212.63 and 3,821.15

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Solution

The fourth proportional to 12,140.88, 18,212.63 and 3,821.15 is: 5,732.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,140.88 : 18,212.63 = 3,821.15 : x
  2. Step 2: Convert to fraction form
    12,140.88/18,212.63 = 3,821.15/x
  3. Step 3: Cross multiply
    12,140.88x = 18,212.63 × 3,821.15
  4. Step 4: Simplify right side
    12,140.88x = 69,593,080.96
  5. Step 5: Solve for x
    x = 69,593,080.96/12,140.88
  6. Step 6: Final answer
    x = 5,732.13

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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.