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Finding the Fourth Proportional to 20,474.70, 30,772.64 and 16,987.33

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Solution

The fourth proportional to 20,474.70, 30,772.64 and 16,987.33 is: 25,531.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,474.70 : 30,772.64 = 16,987.33 : x
  2. Step 2: Convert to fraction form
    20,474.70/30,772.64 = 16,987.33/x
  3. Step 3: Cross multiply
    20,474.70x = 30,772.64 × 16,987.33
  4. Step 4: Simplify right side
    20,474.70x = 522,744,990.65
  5. Step 5: Solve for x
    x = 522,744,990.65/20,474.70
  6. Step 6: Final answer
    x = 25,531.26

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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.