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Finding the Fourth Proportional to 28,175.97, 38,841.42 and 21,449.88

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Solution

The fourth proportional to 28,175.97, 38,841.42 and 21,449.88 is: 29,569.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,175.97 : 38,841.42 = 21,449.88 : x
  2. Step 2: Convert to fraction form
    28,175.97/38,841.42 = 21,449.88/x
  3. Step 3: Cross multiply
    28,175.97x = 38,841.42 × 21,449.88
  4. Step 4: Simplify right side
    28,175.97x = 833,143,798.03
  5. Step 5: Solve for x
    x = 833,143,798.03/28,175.97
  6. Step 6: Final answer
    x = 29,569.30

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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.