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Finding the Fourth Proportional to 20,615.66, 30,923.58 and 8,766.38

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Solution

The fourth proportional to 20,615.66, 30,923.58 and 8,766.38 is: 13,149.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.66 : 30,923.58 = 8,766.38 : x
  2. Step 2: Convert to fraction form
    20,615.66/30,923.58 = 8,766.38/x
  3. Step 3: Cross multiply
    20,615.66x = 30,923.58 × 8,766.38
  4. Step 4: Simplify right side
    20,615.66x = 271,087,853.24
  5. Step 5: Solve for x
    x = 271,087,853.24/20,615.66
  6. Step 6: Final answer
    x = 13,149.61

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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.