Home / 20,660.51-28,511.69-11,229.09

Finding the Fourth Proportional to 20,660.51, 28,511.69 and 11,229.09

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Solution

The fourth proportional to 20,660.51, 28,511.69 and 11,229.09 is: 15,496.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.51 : 28,511.69 = 11,229.09 : x
  2. Step 2: Convert to fraction form
    20,660.51/28,511.69 = 11,229.09/x
  3. Step 3: Cross multiply
    20,660.51x = 28,511.69 × 11,229.09
  4. Step 4: Simplify right side
    20,660.51x = 320,160,276.92
  5. Step 5: Solve for x
    x = 320,160,276.92/20,660.51
  6. Step 6: Final answer
    x = 15,496.25

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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.