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Finding the Fourth Proportional to 20,793.81, 28,695.54 and 11,362.57

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Solution

The fourth proportional to 20,793.81, 28,695.54 and 11,362.57 is: 15,680.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,793.81 : 28,695.54 = 11,362.57 : x
  2. Step 2: Convert to fraction form
    20,793.81/28,695.54 = 11,362.57/x
  3. Step 3: Cross multiply
    20,793.81x = 28,695.54 × 11,362.57
  4. Step 4: Simplify right side
    20,793.81x = 326,055,081.94
  5. Step 5: Solve for x
    x = 326,055,081.94/20,793.81
  6. Step 6: Final answer
    x = 15,680.39

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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.