Home / 12,141.63-18,213.75-3,821.90

Finding the Fourth Proportional to 12,141.63, 18,213.75 and 3,821.90

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Solution

The fourth proportional to 12,141.63, 18,213.75 and 3,821.90 is: 5,733.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,141.63 : 18,213.75 = 3,821.90 : x
  2. Step 2: Convert to fraction form
    12,141.63/18,213.75 = 3,821.90/x
  3. Step 3: Cross multiply
    12,141.63x = 18,213.75 × 3,821.90
  4. Step 4: Simplify right side
    12,141.63x = 69,611,040.06
  5. Step 5: Solve for x
    x = 69,611,040.06/12,141.63
  6. Step 6: Final answer
    x = 5,733.25

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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.