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Finding the Fourth Proportional to 20,645.54, 30,968.30 and 5,854.58

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Solution

The fourth proportional to 20,645.54, 30,968.30 and 5,854.58 is: 8,781.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,645.54 : 30,968.30 = 5,854.58 : x
  2. Step 2: Convert to fraction form
    20,645.54/30,968.30 = 5,854.58/x
  3. Step 3: Cross multiply
    20,645.54x = 30,968.30 × 5,854.58
  4. Step 4: Simplify right side
    20,645.54x = 181,306,481.87
  5. Step 5: Solve for x
    x = 181,306,481.87/20,645.54
  6. Step 6: Final answer
    x = 8,781.87

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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.