Home / 20,660.29-28,511.37-11,228.84

Finding the Fourth Proportional to 20,660.29, 28,511.37 and 11,228.84

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Solution

The fourth proportional to 20,660.29, 28,511.37 and 11,228.84 is: 15,495.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.29 : 28,511.37 = 11,228.84 : x
  2. Step 2: Convert to fraction form
    20,660.29/28,511.37 = 11,228.84/x
  3. Step 3: Cross multiply
    20,660.29x = 28,511.37 × 11,228.84
  4. Step 4: Simplify right side
    20,660.29x = 320,149,611.91
  5. Step 5: Solve for x
    x = 320,149,611.91/20,660.29
  6. Step 6: Final answer
    x = 15,495.89

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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.