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Finding the Fourth Proportional to 20,693.95, 30,969.81 and 12,793.41

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Solution

The fourth proportional to 20,693.95, 30,969.81 and 12,793.41 is: 19,146.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,693.95 : 30,969.81 = 12,793.41 : x
  2. Step 2: Convert to fraction form
    20,693.95/30,969.81 = 12,793.41/x
  3. Step 3: Cross multiply
    20,693.95x = 30,969.81 × 12,793.41
  4. Step 4: Simplify right side
    20,693.95x = 396,209,476.95
  5. Step 5: Solve for x
    x = 396,209,476.95/20,693.95
  6. Step 6: Final answer
    x = 19,146.15

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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.