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Finding the Fourth Proportional to 30,940.64, 42,698.12 and 16,793.48

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Solution

The fourth proportional to 30,940.64, 42,698.12 and 16,793.48 is: 23,175.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,940.64 : 42,698.12 = 16,793.48 : x
  2. Step 2: Convert to fraction form
    30,940.64/42,698.12 = 16,793.48/x
  3. Step 3: Cross multiply
    30,940.64x = 42,698.12 × 16,793.48
  4. Step 4: Simplify right side
    30,940.64x = 717,050,172.99
  5. Step 5: Solve for x
    x = 717,050,172.99/30,940.64
  6. Step 6: Final answer
    x = 23,175.03

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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.