Home / 20,661.21-28,511.27-11,229.69

Finding the Fourth Proportional to 20,661.21, 28,511.27 and 11,229.69

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Solution

The fourth proportional to 20,661.21, 28,511.27 and 11,229.69 is: 15,496.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,661.21 : 28,511.27 = 11,229.69 : x
  2. Step 2: Convert to fraction form
    20,661.21/28,511.27 = 11,229.69/x
  3. Step 3: Cross multiply
    20,661.21x = 28,511.27 × 11,229.69
  4. Step 4: Simplify right side
    20,661.21x = 320,172,667.46
  5. Step 5: Solve for x
    x = 320,172,667.46/20,661.21
  6. Step 6: Final answer
    x = 15,496.32

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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.