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Finding the Fourth Proportional to 18,493.60, 27,770.10 and 17,129.20

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Solution

The fourth proportional to 18,493.60, 27,770.10 and 17,129.20 is: 25,721.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,493.60 : 27,770.10 = 17,129.20 : x
  2. Step 2: Convert to fraction form
    18,493.60/27,770.10 = 17,129.20/x
  3. Step 3: Cross multiply
    18,493.60x = 27,770.10 × 17,129.20
  4. Step 4: Simplify right side
    18,493.60x = 475,679,596.92
  5. Step 5: Solve for x
    x = 475,679,596.92/18,493.60
  6. Step 6: Final answer
    x = 25,721.31

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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.