Home / 12,121.46-18,182.22-3,356.40

Finding the Fourth Proportional to 12,121.46, 18,182.22 and 3,356.40

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Solution

The fourth proportional to 12,121.46, 18,182.22 and 3,356.40 is: 5,034.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.46 : 18,182.22 = 3,356.40 : x
  2. Step 2: Convert to fraction form
    12,121.46/18,182.22 = 3,356.40/x
  3. Step 3: Cross multiply
    12,121.46x = 18,182.22 × 3,356.40
  4. Step 4: Simplify right side
    12,121.46x = 61,026,877.68
  5. Step 5: Solve for x
    x = 61,026,877.68/12,121.46
  6. Step 6: Final answer
    x = 5,034.61

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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.