Home / 13,479.81-20,201.21-8,540.66

Finding the Fourth Proportional to 13,479.81, 20,201.21 and 8,540.66

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Solution

The fourth proportional to 13,479.81, 20,201.21 and 8,540.66 is: 12,799.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,479.81 : 20,201.21 = 8,540.66 : x
  2. Step 2: Convert to fraction form
    13,479.81/20,201.21 = 8,540.66/x
  3. Step 3: Cross multiply
    13,479.81x = 20,201.21 × 8,540.66
  4. Step 4: Simplify right side
    13,479.81x = 172,531,666.20
  5. Step 5: Solve for x
    x = 172,531,666.20/13,479.81
  6. Step 6: Final answer
    x = 12,799.27

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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.