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Finding the Fourth Proportional to 20,612.20, 30,904.80 and 8,124.70

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Solution

The fourth proportional to 20,612.20, 30,904.80 and 8,124.70 is: 12,181.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,612.20 : 30,904.80 = 8,124.70 : x
  2. Step 2: Convert to fraction form
    20,612.20/30,904.80 = 8,124.70/x
  3. Step 3: Cross multiply
    20,612.20x = 30,904.80 × 8,124.70
  4. Step 4: Simplify right side
    20,612.20x = 251,092,228.56
  5. Step 5: Solve for x
    x = 251,092,228.56/20,612.20
  6. Step 6: Final answer
    x = 12,181.73

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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.