Home / 20,132.05-27,783.12-11,179.66

Finding the Fourth Proportional to 20,132.05, 27,783.12 and 11,179.66

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Solution

The fourth proportional to 20,132.05, 27,783.12 and 11,179.66 is: 15,428.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,132.05 : 27,783.12 = 11,179.66 : x
  2. Step 2: Convert to fraction form
    20,132.05/27,783.12 = 11,179.66/x
  3. Step 3: Cross multiply
    20,132.05x = 27,783.12 × 11,179.66
  4. Step 4: Simplify right side
    20,132.05x = 310,605,835.34
  5. Step 5: Solve for x
    x = 310,605,835.34/20,132.05
  6. Step 6: Final answer
    x = 15,428.43

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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.