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Finding the Fourth Proportional to 18,721.01, 28,114.97 and 17,968.48

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Solution

The fourth proportional to 18,721.01, 28,114.97 and 17,968.48 is: 26,984.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721.01 : 28,114.97 = 17,968.48 : x
  2. Step 2: Convert to fraction form
    18,721.01/28,114.97 = 17,968.48/x
  3. Step 3: Cross multiply
    18,721.01x = 28,114.97 × 17,968.48
  4. Step 4: Simplify right side
    18,721.01x = 505,183,045.73
  5. Step 5: Solve for x
    x = 505,183,045.73/18,721.01
  6. Step 6: Final answer
    x = 26,984.83

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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.