Home / 20,619.60-28,456.42-11,667.48

Finding the Fourth Proportional to 20,619.60, 28,456.42 and 11,667.48

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Solution

The fourth proportional to 20,619.60, 28,456.42 and 11,667.48 is: 16,101.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.60 : 28,456.42 = 11,667.48 : x
  2. Step 2: Convert to fraction form
    20,619.60/28,456.42 = 11,667.48/x
  3. Step 3: Cross multiply
    20,619.60x = 28,456.42 × 11,667.48
  4. Step 4: Simplify right side
    20,619.60x = 332,014,711.22
  5. Step 5: Solve for x
    x = 332,014,711.22/20,619.60
  6. Step 6: Final answer
    x = 16,101.90

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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.