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Finding the Fourth Proportional to 20,036.70, 30,022.11 and 12,622.77

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Solution

The fourth proportional to 20,036.70, 30,022.11 and 12,622.77 is: 18,913.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,036.70 : 30,022.11 = 12,622.77 : x
  2. Step 2: Convert to fraction form
    20,036.70/30,022.11 = 12,622.77/x
  3. Step 3: Cross multiply
    20,036.70x = 30,022.11 × 12,622.77
  4. Step 4: Simplify right side
    20,036.70x = 378,962,189.44
  5. Step 5: Solve for x
    x = 378,962,189.44/20,036.70
  6. Step 6: Final answer
    x = 18,913.40

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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.