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Finding the Fourth Proportional to 20,190.90, 30,287.70 and 6,863.70

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Solution

The fourth proportional to 20,190.90, 30,287.70 and 6,863.70 is: 10,296.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,190.90 : 30,287.70 = 6,863.70 : x
  2. Step 2: Convert to fraction form
    20,190.90/30,287.70 = 6,863.70/x
  3. Step 3: Cross multiply
    20,190.90x = 30,287.70 × 6,863.70
  4. Step 4: Simplify right side
    20,190.90x = 207,885,686.49
  5. Step 5: Solve for x
    x = 207,885,686.49/20,190.90
  6. Step 6: Final answer
    x = 10,296.01

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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.