Home / 21,549.79-29,739.72-11,989.73

Finding the Fourth Proportional to 21,549.79, 29,739.72 and 11,989.73

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Solution

The fourth proportional to 21,549.79, 29,739.72 and 11,989.73 is: 16,546.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,549.79 : 29,739.72 = 11,989.73 : x
  2. Step 2: Convert to fraction form
    21,549.79/29,739.72 = 11,989.73/x
  3. Step 3: Cross multiply
    21,549.79x = 29,739.72 × 11,989.73
  4. Step 4: Simplify right side
    21,549.79x = 356,571,004.43
  5. Step 5: Solve for x
    x = 356,571,004.43/21,549.79
  6. Step 6: Final answer
    x = 16,546.38

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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.