Home / 11,412.38-17,121.30-3,621.20

Finding the Fourth Proportional to 11,412.38, 17,121.30 and 3,621.20

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Solution

The fourth proportional to 11,412.38, 17,121.30 and 3,621.20 is: 5,432.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,412.38 : 17,121.30 = 3,621.20 : x
  2. Step 2: Convert to fraction form
    11,412.38/17,121.30 = 3,621.20/x
  3. Step 3: Cross multiply
    11,412.38x = 17,121.30 × 3,621.20
  4. Step 4: Simplify right side
    11,412.38x = 61,999,565.95
  5. Step 5: Solve for x
    x = 61,999,565.95/11,412.38
  6. Step 6: Final answer
    x = 5,432.66

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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.