Home / 19,720.72-27,220.62-12,169.36

Finding the Fourth Proportional to 19,720.72, 27,220.62 and 12,169.36

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Solution

The fourth proportional to 19,720.72, 27,220.62 and 12,169.36 is: 16,797.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,720.72 : 27,220.62 = 12,169.36 : x
  2. Step 2: Convert to fraction form
    19,720.72/27,220.62 = 12,169.36/x
  3. Step 3: Cross multiply
    19,720.72x = 27,220.62 × 12,169.36
  4. Step 4: Simplify right side
    19,720.72x = 331,257,524.20
  5. Step 5: Solve for x
    x = 331,257,524.20/19,720.72
  6. Step 6: Final answer
    x = 16,797.44

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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.