Home / 20,660.92-28,511.47-11,709.25

Finding the Fourth Proportional to 20,660.92, 28,511.47 and 11,709.25

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Solution

The fourth proportional to 20,660.92, 28,511.47 and 11,709.25 is: 16,158.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.92 : 28,511.47 = 11,709.25 : x
  2. Step 2: Convert to fraction form
    20,660.92/28,511.47 = 11,709.25/x
  3. Step 3: Cross multiply
    20,660.92x = 28,511.47 × 11,709.25
  4. Step 4: Simplify right side
    20,660.92x = 333,847,829.55
  5. Step 5: Solve for x
    x = 333,847,829.55/20,660.92
  6. Step 6: Final answer
    x = 16,158.42

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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.