Home / 20,150.94-27,816.12-15,129.66

Finding the Fourth Proportional to 20,150.94, 27,816.12 and 15,129.66

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Solution

The fourth proportional to 20,150.94, 27,816.12 and 15,129.66 is: 20,884.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,150.94 : 27,816.12 = 15,129.66 : x
  2. Step 2: Convert to fraction form
    20,150.94/27,816.12 = 15,129.66/x
  3. Step 3: Cross multiply
    20,150.94x = 27,816.12 × 15,129.66
  4. Step 4: Simplify right side
    20,150.94x = 420,848,438.12
  5. Step 5: Solve for x
    x = 420,848,438.12/20,150.94
  6. Step 6: Final answer
    x = 20,884.80

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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.