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Finding the Fourth Proportional to 30,990.67, 42,766.98 and 16,843.52

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Solution

The fourth proportional to 30,990.67, 42,766.98 and 16,843.52 is: 23,243.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,990.67 : 42,766.98 = 16,843.52 : x
  2. Step 2: Convert to fraction form
    30,990.67/42,766.98 = 16,843.52/x
  3. Step 3: Cross multiply
    30,990.67x = 42,766.98 × 16,843.52
  4. Step 4: Simplify right side
    30,990.67x = 720,346,333.94
  5. Step 5: Solve for x
    x = 720,346,333.94/30,990.67
  6. Step 6: Final answer
    x = 23,243.97

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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.