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Finding the Fourth Proportional to 20,695.50, 31,046.50 and 6,847.74

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Solution

The fourth proportional to 20,695.50, 31,046.50 and 6,847.74 is: 10,272.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,695.50 : 31,046.50 = 6,847.74 : x
  2. Step 2: Convert to fraction form
    20,695.50/31,046.50 = 6,847.74/x
  3. Step 3: Cross multiply
    20,695.50x = 31,046.50 × 6,847.74
  4. Step 4: Simplify right side
    20,695.50x = 212,598,359.91
  5. Step 5: Solve for x
    x = 212,598,359.91/20,695.50
  6. Step 6: Final answer
    x = 10,272.69

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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.