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Finding the Fourth Proportional to 20,140.20, 30,210.30 and 19,794.60

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Solution

The fourth proportional to 20,140.20, 30,210.30 and 19,794.60 is: 29,691.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,140.20 : 30,210.30 = 19,794.60 : x
  2. Step 2: Convert to fraction form
    20,140.20/30,210.30 = 19,794.60/x
  3. Step 3: Cross multiply
    20,140.20x = 30,210.30 × 19,794.60
  4. Step 4: Simplify right side
    20,140.20x = 598,000,804.38
  5. Step 5: Solve for x
    x = 598,000,804.38/20,140.20
  6. Step 6: Final answer
    x = 29,691.90

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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.