Home / 19,791.10-27,330.22-12,729.78

Finding the Fourth Proportional to 19,791.10, 27,330.22 and 12,729.78

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Solution

The fourth proportional to 19,791.10, 27,330.22 and 12,729.78 is: 17,579.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,791.10 : 27,330.22 = 12,729.78 : x
  2. Step 2: Convert to fraction form
    19,791.10/27,330.22 = 12,729.78/x
  3. Step 3: Cross multiply
    19,791.10x = 27,330.22 × 12,729.78
  4. Step 4: Simplify right side
    19,791.10x = 347,907,687.95
  5. Step 5: Solve for x
    x = 347,907,687.95/19,791.10
  6. Step 6: Final answer
    x = 17,579.00

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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.