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Finding the Fourth Proportional to 30,940.76, 42,698.29 and 16,793.60

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Solution

The fourth proportional to 30,940.76, 42,698.29 and 16,793.60 is: 23,175.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,940.76 : 42,698.29 = 16,793.60 : x
  2. Step 2: Convert to fraction form
    30,940.76/42,698.29 = 16,793.60/x
  3. Step 3: Cross multiply
    30,940.76x = 42,698.29 × 16,793.60
  4. Step 4: Simplify right side
    30,940.76x = 717,058,002.94
  5. Step 5: Solve for x
    x = 717,058,002.94/30,940.76
  6. Step 6: Final answer
    x = 23,175.19

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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.