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Finding the Fourth Proportional to 20,793, 28,694.34 and 11,361.63

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Solution

The fourth proportional to 20,793, 28,694.34 and 11,361.63 is: 15,679.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,793 : 28,694.34 = 11,361.63 : x
  2. Step 2: Convert to fraction form
    20,793/28,694.34 = 11,361.63/x
  3. Step 3: Cross multiply
    20,793x = 28,694.34 × 11,361.63
  4. Step 4: Simplify right side
    20,793x = 326,014,474.17
  5. Step 5: Solve for x
    x = 326,014,474.17/20,793
  6. Step 6: Final answer
    x = 15,679.05

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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.