Home / 20,496.31-28,285.61-11,999.21

Finding the Fourth Proportional to 20,496.31, 28,285.61 and 11,999.21

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Solution

The fourth proportional to 20,496.31, 28,285.61 and 11,999.21 is: 16,559.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,496.31 : 28,285.61 = 11,999.21 : x
  2. Step 2: Convert to fraction form
    20,496.31/28,285.61 = 11,999.21/x
  3. Step 3: Cross multiply
    20,496.31x = 28,285.61 × 11,999.21
  4. Step 4: Simplify right side
    20,496.31x = 339,404,772.94
  5. Step 5: Solve for x
    x = 339,404,772.94/20,496.31
  6. Step 6: Final answer
    x = 16,559.31

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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.