Home / 12,289.86-18,437.62-3,855.90

Finding the Fourth Proportional to 12,289.86, 18,437.62 and 3,855.90

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Solution

The fourth proportional to 12,289.86, 18,437.62 and 3,855.90 is: 5,784.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,289.86 : 18,437.62 = 3,855.90 : x
  2. Step 2: Convert to fraction form
    12,289.86/18,437.62 = 3,855.90/x
  3. Step 3: Cross multiply
    12,289.86x = 18,437.62 × 3,855.90
  4. Step 4: Simplify right side
    12,289.86x = 71,093,618.96
  5. Step 5: Solve for x
    x = 71,093,618.96/12,289.86
  6. Step 6: Final answer
    x = 5,784.74

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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.