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Finding the Fourth Proportional to 20,793.91, 28,695.60 and 11,233.80

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Solution

The fourth proportional to 20,793.91, 28,695.60 and 11,233.80 is: 15,502.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,793.91 : 28,695.60 = 11,233.80 : x
  2. Step 2: Convert to fraction form
    20,793.91/28,695.60 = 11,233.80/x
  3. Step 3: Cross multiply
    20,793.91x = 28,695.60 × 11,233.80
  4. Step 4: Simplify right side
    20,793.91x = 322,360,631.28
  5. Step 5: Solve for x
    x = 322,360,631.28/20,793.91
  6. Step 6: Final answer
    x = 15,502.65

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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.