Home / 12,321.32-18,485.90-4,418.48

Finding the Fourth Proportional to 12,321.32, 18,485.90 and 4,418.48

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Solution

The fourth proportional to 12,321.32, 18,485.90 and 4,418.48 is: 6,629.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,321.32 : 18,485.90 = 4,418.48 : x
  2. Step 2: Convert to fraction form
    12,321.32/18,485.90 = 4,418.48/x
  3. Step 3: Cross multiply
    12,321.32x = 18,485.90 × 4,418.48
  4. Step 4: Simplify right side
    12,321.32x = 81,679,579.43
  5. Step 5: Solve for x
    x = 81,679,579.43/12,321.32
  6. Step 6: Final answer
    x = 6,629.13

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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.