Home / 20,191.89-27,867.80-12,126.09

Finding the Fourth Proportional to 20,191.89, 27,867.80 and 12,126.09

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Solution

The fourth proportional to 20,191.89, 27,867.80 and 12,126.09 is: 16,735.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,191.89 : 27,867.80 = 12,126.09 : x
  2. Step 2: Convert to fraction form
    20,191.89/27,867.80 = 12,126.09/x
  3. Step 3: Cross multiply
    20,191.89x = 27,867.80 × 12,126.09
  4. Step 4: Simplify right side
    20,191.89x = 337,927,390.27
  5. Step 5: Solve for x
    x = 337,927,390.27/20,191.89
  6. Step 6: Final answer
    x = 16,735.80

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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.