Home / 20,620.34-28,456.07-11,667.66

Finding the Fourth Proportional to 20,620.34, 28,456.07 and 11,667.66

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Solution

The fourth proportional to 20,620.34, 28,456.07 and 11,667.66 is: 16,101.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,620.34 : 28,456.07 = 11,667.66 : x
  2. Step 2: Convert to fraction form
    20,620.34/28,456.07 = 11,667.66/x
  3. Step 3: Cross multiply
    20,620.34x = 28,456.07 × 11,667.66
  4. Step 4: Simplify right side
    20,620.34x = 332,015,720.53
  5. Step 5: Solve for x
    x = 332,015,720.53/20,620.34
  6. Step 6: Final answer
    x = 16,101.37

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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.