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Finding the Fourth Proportional to 19,785.97, 29,621.49 and 13,855.51

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Solution

The fourth proportional to 19,785.97, 29,621.49 and 13,855.51 is: 20,743.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,785.97 : 29,621.49 = 13,855.51 : x
  2. Step 2: Convert to fraction form
    19,785.97/29,621.49 = 13,855.51/x
  3. Step 3: Cross multiply
    19,785.97x = 29,621.49 × 13,855.51
  4. Step 4: Simplify right side
    19,785.97x = 410,420,850.91
  5. Step 5: Solve for x
    x = 410,420,850.91/19,785.97
  6. Step 6: Final answer
    x = 20,743.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.