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Finding the Fourth Proportional to 20,653.79, 30,982.20 and 5,863.89

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Solution

The fourth proportional to 20,653.79, 30,982.20 and 5,863.89 is: 8,796.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,653.79 : 30,982.20 = 5,863.89 : x
  2. Step 2: Convert to fraction form
    20,653.79/30,982.20 = 5,863.89/x
  3. Step 3: Cross multiply
    20,653.79x = 30,982.20 × 5,863.89
  4. Step 4: Simplify right side
    20,653.79x = 181,676,306.95
  5. Step 5: Solve for x
    x = 181,676,306.95/20,653.79
  6. Step 6: Final answer
    x = 8,796.27

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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.