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Finding the Fourth Proportional to 20,476.89, 30,695.88 and 8,004.91

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Solution

The fourth proportional to 20,476.89, 30,695.88 and 8,004.91 is: 11,999.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,476.89 : 30,695.88 = 8,004.91 : x
  2. Step 2: Convert to fraction form
    20,476.89/30,695.88 = 8,004.91/x
  3. Step 3: Cross multiply
    20,476.89x = 30,695.88 × 8,004.91
  4. Step 4: Simplify right side
    20,476.89x = 245,717,716.75
  5. Step 5: Solve for x
    x = 245,717,716.75/20,476.89
  6. Step 6: Final answer
    x = 11,999.76

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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.