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Finding the Fourth Proportional to 20,106.20, 30,110.70 and 19,231.40

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Solution

The fourth proportional to 20,106.20, 30,110.70 and 19,231.40 is: 28,800.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,106.20 : 30,110.70 = 19,231.40 : x
  2. Step 2: Convert to fraction form
    20,106.20/30,110.70 = 19,231.40/x
  3. Step 3: Cross multiply
    20,106.20x = 30,110.70 × 19,231.40
  4. Step 4: Simplify right side
    20,106.20x = 579,070,915.98
  5. Step 5: Solve for x
    x = 579,070,915.98/20,106.20
  6. Step 6: Final answer
    x = 28,800.61

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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.