Home / 12,108.12-18,162.32-3,787.80

Finding the Fourth Proportional to 12,108.12, 18,162.32 and 3,787.80

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Solution

The fourth proportional to 12,108.12, 18,162.32 and 3,787.80 is: 5,681.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,108.12 : 18,162.32 = 3,787.80 : x
  2. Step 2: Convert to fraction form
    12,108.12/18,162.32 = 3,787.80/x
  3. Step 3: Cross multiply
    12,108.12x = 18,162.32 × 3,787.80
  4. Step 4: Simplify right side
    12,108.12x = 68,795,216.76
  5. Step 5: Solve for x
    x = 68,795,216.76/12,108.12
  6. Step 6: Final answer
    x = 5,681.74

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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.