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Finding the Fourth Proportional to 20,624.56, 30,915.56 and 8,127.68

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Solution

The fourth proportional to 20,624.56, 30,915.56 and 8,127.68 is: 12,183.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,624.56 : 30,915.56 = 8,127.68 : x
  2. Step 2: Convert to fraction form
    20,624.56/30,915.56 = 8,127.68/x
  3. Step 3: Cross multiply
    20,624.56x = 30,915.56 × 8,127.68
  4. Step 4: Simplify right side
    20,624.56x = 251,271,778.70
  5. Step 5: Solve for x
    x = 251,271,778.70/20,624.56
  6. Step 6: Final answer
    x = 12,183.13

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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.