Home / 20,646.41-30,979.89-8,175.42

Finding the Fourth Proportional to 20,646.41, 30,979.89 and 8,175.42

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Solution

The fourth proportional to 20,646.41, 30,979.89 and 8,175.42 is: 12,267.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,646.41 : 30,979.89 = 8,175.42 : x
  2. Step 2: Convert to fraction form
    20,646.41/30,979.89 = 8,175.42/x
  3. Step 3: Cross multiply
    20,646.41x = 30,979.89 × 8,175.42
  4. Step 4: Simplify right side
    20,646.41x = 253,273,612.30
  5. Step 5: Solve for x
    x = 253,273,612.30/20,646.41
  6. Step 6: Final answer
    x = 12,267.20

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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.