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Finding the Fourth Proportional to 20,746, 28,630.20 and 11,793.88

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Solution

The fourth proportional to 20,746, 28,630.20 and 11,793.88 is: 16,275.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,746 : 28,630.20 = 11,793.88 : x
  2. Step 2: Convert to fraction form
    20,746/28,630.20 = 11,793.88/x
  3. Step 3: Cross multiply
    20,746x = 28,630.20 × 11,793.88
  4. Step 4: Simplify right side
    20,746x = 337,661,143.18
  5. Step 5: Solve for x
    x = 337,661,143.18/20,746
  6. Step 6: Final answer
    x = 16,275.96

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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.