Home / 11,215.08-16,821.18-3,421.80

Finding the Fourth Proportional to 11,215.08, 16,821.18 and 3,421.80

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Solution

The fourth proportional to 11,215.08, 16,821.18 and 3,421.80 is: 5,132.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,215.08 : 16,821.18 = 3,421.80 : x
  2. Step 2: Convert to fraction form
    11,215.08/16,821.18 = 3,421.80/x
  3. Step 3: Cross multiply
    11,215.08x = 16,821.18 × 3,421.80
  4. Step 4: Simplify right side
    11,215.08x = 57,558,713.72
  5. Step 5: Solve for x
    x = 57,558,713.72/11,215.08
  6. Step 6: Final answer
    x = 5,132.26

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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.