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Finding the Fourth Proportional to 28,170.68, 42,171.84 and 17,043.74

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Solution

The fourth proportional to 28,170.68, 42,171.84 and 17,043.74 is: 25,514.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,170.68 : 42,171.84 = 17,043.74 : x
  2. Step 2: Convert to fraction form
    28,170.68/42,171.84 = 17,043.74/x
  3. Step 3: Cross multiply
    28,170.68x = 42,171.84 × 17,043.74
  4. Step 4: Simplify right side
    28,170.68x = 718,765,876.28
  5. Step 5: Solve for x
    x = 718,765,876.28/28,170.68
  6. Step 6: Final answer
    x = 25,514.68

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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.