Home / 20,631-28,471.26-11,199.54

Finding the Fourth Proportional to 20,631, 28,471.26 and 11,199.54

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Solution

The fourth proportional to 20,631, 28,471.26 and 11,199.54 is: 15,455.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,631 : 28,471.26 = 11,199.54 : x
  2. Step 2: Convert to fraction form
    20,631/28,471.26 = 11,199.54/x
  3. Step 3: Cross multiply
    20,631x = 28,471.26 × 11,199.54
  4. Step 4: Simplify right side
    20,631x = 318,865,015.22
  5. Step 5: Solve for x
    x = 318,865,015.22/20,631
  6. Step 6: Final answer
    x = 15,455.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.