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Finding the Fourth Proportional to 20,979.62, 31,458.62 and 6,186.62

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Solution

The fourth proportional to 20,979.62, 31,458.62 and 6,186.62 is: 9,276.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,979.62 : 31,458.62 = 6,186.62 : x
  2. Step 2: Convert to fraction form
    20,979.62/31,458.62 = 6,186.62/x
  3. Step 3: Cross multiply
    20,979.62x = 31,458.62 × 6,186.62
  4. Step 4: Simplify right side
    20,979.62x = 194,622,575.38
  5. Step 5: Solve for x
    x = 194,622,575.38/20,979.62
  6. Step 6: Final answer
    x = 9,276.74

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1.5x scale

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.