Home / 12,161.08-18,240-3,396.88

Finding the Fourth Proportional to 12,161.08, 18,240 and 3,396.88

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Solution

The fourth proportional to 12,161.08, 18,240 and 3,396.88 is: 5,094.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,161.08 : 18,240 = 3,396.88 : x
  2. Step 2: Convert to fraction form
    12,161.08/18,240 = 3,396.88/x
  3. Step 3: Cross multiply
    12,161.08x = 18,240 × 3,396.88
  4. Step 4: Simplify right side
    12,161.08x = 61,959,091.20
  5. Step 5: Solve for x
    x = 61,959,091.20/12,161.08
  6. Step 6: Final answer
    x = 5,094.87

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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.