Home / 20,012.79-27,630.48-12,845.78

Finding the Fourth Proportional to 20,012.79, 27,630.48 and 12,845.78

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Solution

The fourth proportional to 20,012.79, 27,630.48 and 12,845.78 is: 17,735.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,012.79 : 27,630.48 = 12,845.78 : x
  2. Step 2: Convert to fraction form
    20,012.79/27,630.48 = 12,845.78/x
  3. Step 3: Cross multiply
    20,012.79x = 27,630.48 × 12,845.78
  4. Step 4: Simplify right side
    20,012.79x = 354,935,067.37
  5. Step 5: Solve for x
    x = 354,935,067.37/20,012.79
  6. Step 6: Final answer
    x = 17,735.41

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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.