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Finding the Fourth Proportional to 30,990.53, 42,767.21 and 16,843.39

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Solution

The fourth proportional to 30,990.53, 42,767.21 and 16,843.39 is: 23,244.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,990.53 : 42,767.21 = 16,843.39 : x
  2. Step 2: Convert to fraction form
    30,990.53/42,767.21 = 16,843.39/x
  3. Step 3: Cross multiply
    30,990.53x = 42,767.21 × 16,843.39
  4. Step 4: Simplify right side
    30,990.53x = 720,344,797.24
  5. Step 5: Solve for x
    x = 720,344,797.24/30,990.53
  6. Step 6: Final answer
    x = 23,244.03

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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.