Home / 28,906.30-43,410.65-21,123.90

Finding the Fourth Proportional to 28,906.30, 43,410.65 and 21,123.90

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Solution

The fourth proportional to 28,906.30, 43,410.65 and 21,123.90 is: 31,723.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,906.30 : 43,410.65 = 21,123.90 : x
  2. Step 2: Convert to fraction form
    28,906.30/43,410.65 = 21,123.90/x
  3. Step 3: Cross multiply
    28,906.30x = 43,410.65 × 21,123.90
  4. Step 4: Simplify right side
    28,906.30x = 917,002,229.54
  5. Step 5: Solve for x
    x = 917,002,229.54/28,906.30
  6. Step 6: Final answer
    x = 31,723.27

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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.