Home / 11,681.22-16,120.52-6,645.90

Finding the Fourth Proportional to 11,681.22, 16,120.52 and 6,645.90

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Solution

The fourth proportional to 11,681.22, 16,120.52 and 6,645.90 is: 9,171.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,681.22 : 16,120.52 = 6,645.90 : x
  2. Step 2: Convert to fraction form
    11,681.22/16,120.52 = 6,645.90/x
  3. Step 3: Cross multiply
    11,681.22x = 16,120.52 × 6,645.90
  4. Step 4: Simplify right side
    11,681.22x = 107,135,363.87
  5. Step 5: Solve for x
    x = 107,135,363.87/11,681.22
  6. Step 6: Final answer
    x = 9,171.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.