Home / 20,505.57-30,768.08-12,201.99

Finding the Fourth Proportional to 20,505.57, 30,768.08 and 12,201.99

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Solution

The fourth proportional to 20,505.57, 30,768.08 and 12,201.99 is: 18,308.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,505.57 : 30,768.08 = 12,201.99 : x
  2. Step 2: Convert to fraction form
    20,505.57/30,768.08 = 12,201.99/x
  3. Step 3: Cross multiply
    20,505.57x = 30,768.08 × 12,201.99
  4. Step 4: Simplify right side
    20,505.57x = 375,431,804.48
  5. Step 5: Solve for x
    x = 375,431,804.48/20,505.57
  6. Step 6: Final answer
    x = 18,308.77

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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.