Home / 20,660.90-28,511.80-11,229.26

Finding the Fourth Proportional to 20,660.90, 28,511.80 and 11,229.26

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Solution

The fourth proportional to 20,660.90, 28,511.80 and 11,229.26 is: 15,496.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.90 : 28,511.80 = 11,229.26 : x
  2. Step 2: Convert to fraction form
    20,660.90/28,511.80 = 11,229.26/x
  3. Step 3: Cross multiply
    20,660.90x = 28,511.80 × 11,229.26
  4. Step 4: Simplify right side
    20,660.90x = 320,166,244.64
  5. Step 5: Solve for x
    x = 320,166,244.64/20,660.90
  6. Step 6: Final answer
    x = 15,496.24

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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.