Home / 20,191.34-27,877.77-12,640.73

Finding the Fourth Proportional to 20,191.34, 27,877.77 and 12,640.73

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Solution

The fourth proportional to 20,191.34, 27,877.77 and 12,640.73 is: 17,452.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,191.34 : 27,877.77 = 12,640.73 : x
  2. Step 2: Convert to fraction form
    20,191.34/27,877.77 = 12,640.73/x
  3. Step 3: Cross multiply
    20,191.34x = 27,877.77 × 12,640.73
  4. Step 4: Simplify right side
    20,191.34x = 352,395,224.18
  5. Step 5: Solve for x
    x = 352,395,224.18/20,191.34
  6. Step 6: Final answer
    x = 17,452.79

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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.