Home / 20,131.60-27,781.88-11,179.68

Finding the Fourth Proportional to 20,131.60, 27,781.88 and 11,179.68

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Solution

The fourth proportional to 20,131.60, 27,781.88 and 11,179.68 is: 15,428.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,131.60 : 27,781.88 = 11,179.68 : x
  2. Step 2: Convert to fraction form
    20,131.60/27,781.88 = 11,179.68/x
  3. Step 3: Cross multiply
    20,131.60x = 27,781.88 × 11,179.68
  4. Step 4: Simplify right side
    20,131.60x = 310,592,528.20
  5. Step 5: Solve for x
    x = 310,592,528.20/20,131.60
  6. Step 6: Final answer
    x = 15,428.11

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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.