Home / 20,129.41-27,774.11-12,171.46

Finding the Fourth Proportional to 20,129.41, 27,774.11 and 12,171.46

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Solution

The fourth proportional to 20,129.41, 27,774.11 and 12,171.46 is: 16,793.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.41 : 27,774.11 = 12,171.46 : x
  2. Step 2: Convert to fraction form
    20,129.41/27,774.11 = 12,171.46/x
  3. Step 3: Cross multiply
    20,129.41x = 27,774.11 × 12,171.46
  4. Step 4: Simplify right side
    20,129.41x = 338,051,408.04
  5. Step 5: Solve for x
    x = 338,051,408.04/20,129.41
  6. Step 6: Final answer
    x = 16,793.91

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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.