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Finding the Fourth Proportional to 20,648.59, 30,933.09 and 12,335.27

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Solution

The fourth proportional to 20,648.59, 30,933.09 and 12,335.27 is: 18,479.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,648.59 : 30,933.09 = 12,335.27 : x
  2. Step 2: Convert to fraction form
    20,648.59/30,933.09 = 12,335.27/x
  3. Step 3: Cross multiply
    20,648.59x = 30,933.09 × 12,335.27
  4. Step 4: Simplify right side
    20,648.59x = 381,567,862.42
  5. Step 5: Solve for x
    x = 381,567,862.42/20,648.59
  6. Step 6: Final answer
    x = 18,479.13

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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.