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Finding the Fourth Proportional to 19,891.80, 27,452.10 and 13,165.68

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Solution

The fourth proportional to 19,891.80, 27,452.10 and 13,165.68 is: 18,169.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,891.80 : 27,452.10 = 13,165.68 : x
  2. Step 2: Convert to fraction form
    19,891.80/27,452.10 = 13,165.68/x
  3. Step 3: Cross multiply
    19,891.80x = 27,452.10 × 13,165.68
  4. Step 4: Simplify right side
    19,891.80x = 361,425,563.93
  5. Step 5: Solve for x
    x = 361,425,563.93/19,891.80
  6. Step 6: Final answer
    x = 18,169.58

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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.