Home / 20,660.28-28,511.36-11,228.84

Finding the Fourth Proportional to 20,660.28, 28,511.36 and 11,228.84

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Solution

The fourth proportional to 20,660.28, 28,511.36 and 11,228.84 is: 15,495.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.28 : 28,511.36 = 11,228.84 : x
  2. Step 2: Convert to fraction form
    20,660.28/28,511.36 = 11,228.84/x
  3. Step 3: Cross multiply
    20,660.28x = 28,511.36 × 11,228.84
  4. Step 4: Simplify right side
    20,660.28x = 320,149,499.62
  5. Step 5: Solve for x
    x = 320,149,499.62/20,660.28
  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.